2005-04-17 05:20:36 +07:00
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/*
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* pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/pm.h>
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2010-02-18 05:44:09 +07:00
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#include <linux/pm_runtime.h>
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2005-04-17 05:20:36 +07:00
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#include <linux/pci.h>
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2008-11-11 05:30:45 +07:00
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#include <linux/pci-acpi.h>
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2011-03-21 10:29:20 +07:00
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#include <linux/pci-aspm.h>
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2005-04-17 05:20:36 +07:00
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#include <linux/acpi.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 15:04:11 +07:00
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#include <linux/slab.h>
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2005-04-17 05:20:36 +07:00
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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2011-01-07 06:55:09 +07:00
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#include <acpi/apei.h>
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2005-04-17 05:20:36 +07:00
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2009-07-29 03:45:54 +07:00
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#define PREFIX "ACPI: "
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2005-04-17 05:20:36 +07:00
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#define _COMPONENT ACPI_PCI_COMPONENT
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2007-02-13 10:42:12 +07:00
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ACPI_MODULE_NAME("pci_root");
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2005-04-17 05:20:36 +07:00
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#define ACPI_PCI_ROOT_CLASS "pci_bridge"
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#define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge"
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2005-08-05 11:44:28 +07:00
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static int acpi_pci_root_add(struct acpi_device *device);
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static int acpi_pci_root_remove(struct acpi_device *device, int type);
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static int acpi_pci_root_start(struct acpi_device *device);
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2005-04-17 05:20:36 +07:00
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2011-01-07 06:55:09 +07:00
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#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \
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| OSC_ACTIVE_STATE_PWR_SUPPORT \
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| OSC_CLOCK_PWR_CAPABILITY_SUPPORT \
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| OSC_MSI_SUPPORT)
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2010-01-10 23:15:36 +07:00
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static const struct acpi_device_id root_device_ids[] = {
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2007-07-23 19:44:41 +07:00
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{"PNP0A03", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, root_device_ids);
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2005-04-17 05:20:36 +07:00
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static struct acpi_driver acpi_pci_root_driver = {
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2007-02-13 11:33:40 +07:00
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.name = "pci_root",
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2005-08-05 11:44:28 +07:00
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.class = ACPI_PCI_ROOT_CLASS,
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2007-07-23 19:44:41 +07:00
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.ids = root_device_ids,
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2005-08-05 11:44:28 +07:00
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.ops = {
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.add = acpi_pci_root_add,
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.remove = acpi_pci_root_remove,
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.start = acpi_pci_root_start,
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},
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2005-04-17 05:20:36 +07:00
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};
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static LIST_HEAD(acpi_pci_roots);
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static struct acpi_pci_driver *sub_driver;
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2009-02-09 13:59:29 +07:00
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static DEFINE_MUTEX(osc_lock);
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2005-04-17 05:20:36 +07:00
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int acpi_pci_register_driver(struct acpi_pci_driver *driver)
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{
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int n = 0;
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2009-06-19 03:47:02 +07:00
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struct acpi_pci_root *root;
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2005-04-17 05:20:36 +07:00
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struct acpi_pci_driver **pptr = &sub_driver;
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while (*pptr)
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pptr = &(*pptr)->next;
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*pptr = driver;
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if (!driver->add)
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return 0;
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2009-06-19 03:47:02 +07:00
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list_for_each_entry(root, &acpi_pci_roots, node) {
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2006-05-20 03:54:43 +07:00
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driver->add(root->device->handle);
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2005-04-17 05:20:36 +07:00
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n++;
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}
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return n;
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}
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2005-08-05 11:44:28 +07:00
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2005-04-17 05:20:36 +07:00
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EXPORT_SYMBOL(acpi_pci_register_driver);
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void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
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{
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2009-06-19 03:47:02 +07:00
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struct acpi_pci_root *root;
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2005-04-17 05:20:36 +07:00
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struct acpi_pci_driver **pptr = &sub_driver;
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while (*pptr) {
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2006-12-20 03:56:09 +07:00
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if (*pptr == driver)
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break;
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pptr = &(*pptr)->next;
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2005-04-17 05:20:36 +07:00
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}
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2006-12-20 03:56:09 +07:00
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BUG_ON(!*pptr);
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*pptr = (*pptr)->next;
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2005-04-17 05:20:36 +07:00
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if (!driver->remove)
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return;
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2009-06-19 03:47:02 +07:00
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list_for_each_entry(root, &acpi_pci_roots, node)
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2006-05-20 03:54:43 +07:00
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driver->remove(root->device->handle);
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2005-04-17 05:20:36 +07:00
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}
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2005-08-05 11:44:28 +07:00
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2005-04-17 05:20:36 +07:00
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EXPORT_SYMBOL(acpi_pci_unregister_driver);
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2006-12-07 00:17:10 +07:00
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acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus)
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{
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2009-06-19 03:47:02 +07:00
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struct acpi_pci_root *root;
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2006-12-07 00:17:10 +07:00
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2009-06-19 03:47:02 +07:00
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list_for_each_entry(root, &acpi_pci_roots, node)
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2010-03-12 02:20:06 +07:00
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if ((root->segment == (u16) seg) &&
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(root->secondary.start == (u16) bus))
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2009-06-19 03:47:02 +07:00
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return root->device->handle;
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2006-12-07 00:17:10 +07:00
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return NULL;
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}
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EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle);
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2009-06-11 02:55:14 +07:00
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/**
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* acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
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* @handle - the ACPI CA node in question.
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*
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* Note: we could make this API take a struct acpi_device * instead, but
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* for now, it's more convenient to operate on an acpi_handle.
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*/
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int acpi_is_root_bridge(acpi_handle handle)
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{
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int ret;
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struct acpi_device *device;
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ret = acpi_bus_get_device(handle, &device);
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if (ret)
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return 0;
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ret = acpi_match_device_ids(device, root_device_ids);
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if (ret)
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return 0;
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else
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return 1;
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}
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EXPORT_SYMBOL_GPL(acpi_is_root_bridge);
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2005-04-17 05:20:36 +07:00
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static acpi_status
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2005-08-05 11:44:28 +07:00
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get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
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2005-04-17 05:20:36 +07:00
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{
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2010-03-12 02:20:06 +07:00
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struct resource *res = data;
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2005-04-17 05:20:36 +07:00
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struct acpi_resource_address64 address;
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[ACPI] ACPICA 20050930
Completed a major overhaul of the Resource Manager code -
specifically, optimizations in the area of the AML/internal
resource conversion code. The code has been optimized to
simplify and eliminate duplicated code, CPU stack use has
been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have
been standardized for clarity and ease of maintenance (this
includes function, parameter, variable, and struct/typedef
names.)
All Resource Manager dispatch and information tables have
been moved to a single location for clarity and ease of
maintenance. One new file was created, named "rsinfo.c".
The ACPI return macros (return_ACPI_STATUS, etc.) have
been modified to guarantee that the argument is
not evaluated twice, making them less prone to macro
side-effects. However, since there exists the possibility
of additional stack use if a particular compiler cannot
optimize them (such as in the debug generation case),
the original macros are optionally available. Note that
some invocations of the return_VALUE macro may now cause
size mismatch warnings; the return_UINT8 and return_UINT32
macros are provided to eliminate these. (From Randy Dunlap)
Implemented a new mechanism to enable debug tracing for
individual control methods. A new external interface,
acpi_debug_trace(), is provided to enable this mechanism. The
intent is to allow the host OS to easily enable and disable
tracing for problematic control methods. This interface
can be easily exposed to a user or debugger interface if
desired. See the file psxface.c for details.
acpi_ut_callocate() will now return a valid pointer if a
length of zero is specified - a length of one is used
and a warning is issued. This matches the behavior of
acpi_ut_allocate().
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-10-01 06:03:00 +07:00
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if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
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resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 &&
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resource->type != ACPI_RESOURCE_TYPE_ADDRESS64)
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2005-04-17 05:20:36 +07:00
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return AE_OK;
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acpi_resource_to_address64(resource, &address);
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2005-08-05 11:44:28 +07:00
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if ((address.address_length > 0) &&
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2010-03-12 02:20:06 +07:00
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(address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
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res->start = address.minimum;
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res->end = address.minimum + address.address_length - 1;
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}
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2005-04-17 05:20:36 +07:00
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return AE_OK;
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}
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2009-06-19 03:46:52 +07:00
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static acpi_status try_get_root_bridge_busnr(acpi_handle handle,
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2010-03-12 02:20:06 +07:00
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struct resource *res)
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2005-04-17 05:20:36 +07:00
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{
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acpi_status status;
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2010-03-12 02:20:06 +07:00
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res->start = -1;
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2005-08-05 11:44:28 +07:00
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status =
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acpi_walk_resources(handle, METHOD_NAME__CRS,
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2010-03-12 02:20:06 +07:00
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get_root_bridge_busnr_callback, res);
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2005-04-17 05:20:36 +07:00
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if (ACPI_FAILURE(status))
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return status;
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2010-03-12 02:20:06 +07:00
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if (res->start == -1)
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2005-04-17 05:20:36 +07:00
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return AE_ERROR;
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return AE_OK;
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}
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2006-12-21 14:21:13 +07:00
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static void acpi_pci_bridge_scan(struct acpi_device *device)
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{
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int status;
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struct acpi_device *child = NULL;
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if (device->flags.bus_address)
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if (device->parent && device->parent->ops.bind) {
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status = device->parent->ops.bind(device);
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if (!status) {
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list_for_each_entry(child, &device->children, node)
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acpi_pci_bridge_scan(child);
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}
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}
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}
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2009-10-29 10:04:50 +07:00
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static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766";
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2009-02-09 13:59:29 +07:00
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static acpi_status acpi_pci_run_osc(acpi_handle handle,
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const u32 *capbuf, u32 *retval)
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{
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2009-10-29 10:04:50 +07:00
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struct acpi_osc_context context = {
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.uuid_str = pci_osc_uuid_str,
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.rev = 1,
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.cap.length = 12,
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.cap.pointer = (void *)capbuf,
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};
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2009-02-09 13:59:29 +07:00
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acpi_status status;
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2009-10-29 10:04:50 +07:00
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status = acpi_run_osc(handle, &context);
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if (ACPI_SUCCESS(status)) {
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*retval = *((u32 *)(context.ret.pointer + 8));
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kfree(context.ret.pointer);
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2009-02-09 13:59:29 +07:00
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}
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return status;
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}
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|
2010-08-21 06:53:27 +07:00
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|
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static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
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u32 support,
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u32 *control)
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2009-02-09 13:59:29 +07:00
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{
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acpi_status status;
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2010-08-21 06:53:27 +07:00
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u32 result, capbuf[3];
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support &= OSC_PCI_SUPPORT_MASKS;
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support |= root->osc_support_set;
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2009-02-09 13:59:29 +07:00
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|
|
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
|
2010-08-21 06:53:27 +07:00
|
|
|
capbuf[OSC_SUPPORT_TYPE] = support;
|
|
|
|
if (control) {
|
|
|
|
*control &= OSC_PCI_CONTROL_MASKS;
|
|
|
|
capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set;
|
|
|
|
} else {
|
|
|
|
/* Run _OSC query for all possible controls. */
|
|
|
|
capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
|
|
|
|
}
|
2009-02-09 13:59:29 +07:00
|
|
|
|
|
|
|
status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
|
|
|
|
if (ACPI_SUCCESS(status)) {
|
2010-08-21 06:53:27 +07:00
|
|
|
root->osc_support_set = support;
|
ACPI/PCI: Do not preserve _OSC control bits returned by a query
There is the assumption in acpi_pci_osc_control_set() that it is
always sufficient to compare the mask of _OSC control bits to be
requested with the result of an _OSC query where all of the known
control bits have been checked. However, in general, that need not
be the case. For example, if an _OSC feature A depends on an _OSC
feature B and control of A, B plus another _OSC feature C is
requested simultaneously, the BIOS may return A, B, C, while it would
only return C if A and C were requested without B.
That may result in passing a wrong mask of _OSC control bits to an
_OSC control request, in which case the BIOS may only grant control
of a subset of the requested features. Moreover, acpi_pci_run_osc()
will return error code if that happens and the caller of
acpi_pci_osc_control_set() will not know that it's been granted
control of some _OSC features. Consequently, the system will
generally not work as expected.
Apart from this acpi_pci_osc_control_set() always uses the mask
of _OSC control bits returned by the very first invocation of
acpi_pci_query_osc(), but that is done with the second argument
equal to OSC_PCI_SEGMENT_GROUPS_SUPPORT which generally happens
to affect the returned _OSC control bits.
For these reasons, make acpi_pci_osc_control_set() always check if
control of the requested _OSC features will be granted before making
the final control request. As a result, the osc_control_qry and
osc_queried members of struct acpi_pci_root are not necessary any
more, so drop them and remove the remaining code referring to them.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24 04:55:59 +07:00
|
|
|
if (control)
|
2010-08-21 06:53:27 +07:00
|
|
|
*control = result;
|
2009-02-09 13:59:29 +07:00
|
|
|
}
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
acpi_handle tmp;
|
|
|
|
|
|
|
|
status = acpi_get_handle(root->device->handle, "_OSC", &tmp);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
|
|
|
mutex_lock(&osc_lock);
|
2010-08-21 06:53:27 +07:00
|
|
|
status = acpi_pci_query_osc(root, flags, NULL);
|
2009-02-09 13:59:29 +07:00
|
|
|
mutex_unlock(&osc_lock);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2009-07-24 06:03:00 +07:00
|
|
|
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
|
2009-02-09 13:59:29 +07:00
|
|
|
{
|
|
|
|
struct acpi_pci_root *root;
|
2009-06-19 03:47:02 +07:00
|
|
|
|
2009-02-09 13:59:29 +07:00
|
|
|
list_for_each_entry(root, &acpi_pci_roots, node) {
|
|
|
|
if (root->device->handle == handle)
|
|
|
|
return root;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
2009-07-24 06:03:00 +07:00
|
|
|
EXPORT_SYMBOL_GPL(acpi_pci_find_root);
|
2009-02-09 13:59:29 +07:00
|
|
|
|
2009-06-11 02:55:20 +07:00
|
|
|
struct acpi_handle_node {
|
|
|
|
struct list_head node;
|
|
|
|
acpi_handle handle;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev
|
|
|
|
* @handle: the handle in question
|
|
|
|
*
|
|
|
|
* Given an ACPI CA handle, the desired PCI device is located in the
|
|
|
|
* list of PCI devices.
|
|
|
|
*
|
|
|
|
* If the device is found, its reference count is increased and this
|
|
|
|
* function returns a pointer to its data structure. The caller must
|
|
|
|
* decrement the reference count by calling pci_dev_put().
|
|
|
|
* If no device is found, %NULL is returned.
|
|
|
|
*/
|
|
|
|
struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
|
|
|
|
{
|
|
|
|
int dev, fn;
|
|
|
|
unsigned long long adr;
|
|
|
|
acpi_status status;
|
|
|
|
acpi_handle phandle;
|
|
|
|
struct pci_bus *pbus;
|
|
|
|
struct pci_dev *pdev = NULL;
|
|
|
|
struct acpi_handle_node *node, *tmp;
|
|
|
|
struct acpi_pci_root *root;
|
|
|
|
LIST_HEAD(device_list);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Walk up the ACPI CA namespace until we reach a PCI root bridge.
|
|
|
|
*/
|
|
|
|
phandle = handle;
|
|
|
|
while (!acpi_is_root_bridge(phandle)) {
|
|
|
|
node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL);
|
|
|
|
if (!node)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&node->node);
|
|
|
|
node->handle = phandle;
|
|
|
|
list_add(&node->node, &device_list);
|
|
|
|
|
|
|
|
status = acpi_get_parent(phandle, &phandle);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
root = acpi_pci_find_root(phandle);
|
|
|
|
if (!root)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
pbus = root->bus;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now, walk back down the PCI device tree until we return to our
|
|
|
|
* original handle. Assumes that everything between the PCI root
|
|
|
|
* bridge and the device we're looking for must be a P2P bridge.
|
|
|
|
*/
|
|
|
|
list_for_each_entry(node, &device_list, node) {
|
|
|
|
acpi_handle hnd = node->handle;
|
|
|
|
status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
goto out;
|
|
|
|
dev = (adr >> 16) & 0xffff;
|
|
|
|
fn = adr & 0xffff;
|
|
|
|
|
|
|
|
pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn));
|
2009-06-26 06:05:35 +07:00
|
|
|
if (!pdev || hnd == handle)
|
2009-06-11 02:55:20 +07:00
|
|
|
break;
|
|
|
|
|
|
|
|
pbus = pdev->subordinate;
|
|
|
|
pci_dev_put(pdev);
|
2009-10-13 06:01:57 +07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This function may be called for a non-PCI device that has a
|
|
|
|
* PCI parent (eg. a disk under a PCI SATA controller). In that
|
|
|
|
* case pdev->subordinate will be NULL for the parent.
|
|
|
|
*/
|
|
|
|
if (!pbus) {
|
|
|
|
dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n");
|
|
|
|
pdev = NULL;
|
|
|
|
break;
|
|
|
|
}
|
2009-06-11 02:55:20 +07:00
|
|
|
}
|
|
|
|
out:
|
|
|
|
list_for_each_entry_safe(node, tmp, &device_list, node)
|
|
|
|
kfree(node);
|
|
|
|
|
|
|
|
return pdev;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(acpi_get_pci_dev);
|
|
|
|
|
2009-02-09 13:59:29 +07:00
|
|
|
/**
|
2010-08-24 04:53:11 +07:00
|
|
|
* acpi_pci_osc_control_set - Request control of PCI root _OSC features.
|
|
|
|
* @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex).
|
|
|
|
* @mask: Mask of _OSC bits to request control of, place to store control mask.
|
|
|
|
* @req: Mask of _OSC bits the control of is essential to the caller.
|
2009-02-09 13:59:29 +07:00
|
|
|
*
|
2010-08-24 04:53:11 +07:00
|
|
|
* Run _OSC query for @mask and if that is successful, compare the returned
|
|
|
|
* mask of control bits with @req. If all of the @req bits are set in the
|
|
|
|
* returned mask, run _OSC request for it.
|
|
|
|
*
|
|
|
|
* The variable at the @mask address may be modified regardless of whether or
|
|
|
|
* not the function returns success. On success it will contain the mask of
|
|
|
|
* _OSC bits the BIOS has granted control of, but its contents are meaningless
|
|
|
|
* on failure.
|
2009-02-09 13:59:29 +07:00
|
|
|
**/
|
2010-08-24 04:53:11 +07:00
|
|
|
acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req)
|
2009-02-09 13:59:29 +07:00
|
|
|
{
|
2010-08-24 04:53:11 +07:00
|
|
|
struct acpi_pci_root *root;
|
2009-02-09 13:59:29 +07:00
|
|
|
acpi_status status;
|
2010-08-24 04:53:11 +07:00
|
|
|
u32 ctrl, capbuf[3];
|
2009-02-09 13:59:29 +07:00
|
|
|
acpi_handle tmp;
|
|
|
|
|
2010-08-24 04:53:11 +07:00
|
|
|
if (!mask)
|
|
|
|
return AE_BAD_PARAMETER;
|
|
|
|
|
|
|
|
ctrl = *mask & OSC_PCI_CONTROL_MASKS;
|
|
|
|
if ((ctrl & req) != req)
|
2009-02-09 13:59:29 +07:00
|
|
|
return AE_TYPE;
|
|
|
|
|
|
|
|
root = acpi_pci_find_root(handle);
|
|
|
|
if (!root)
|
|
|
|
return AE_NOT_EXIST;
|
|
|
|
|
2010-08-21 06:52:37 +07:00
|
|
|
status = acpi_get_handle(handle, "_OSC", &tmp);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
|
|
|
|
2009-02-09 13:59:29 +07:00
|
|
|
mutex_lock(&osc_lock);
|
2010-08-24 04:53:11 +07:00
|
|
|
|
|
|
|
*mask = ctrl | root->osc_control_set;
|
2009-02-09 13:59:29 +07:00
|
|
|
/* No need to evaluate _OSC if the control was already granted. */
|
2010-08-24 04:53:11 +07:00
|
|
|
if ((root->osc_control_set & ctrl) == ctrl)
|
2009-02-09 13:59:29 +07:00
|
|
|
goto out;
|
|
|
|
|
2010-08-24 04:53:11 +07:00
|
|
|
/* Need to check the available controls bits before requesting them. */
|
|
|
|
while (*mask) {
|
|
|
|
status = acpi_pci_query_osc(root, root->osc_support_set, mask);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
goto out;
|
|
|
|
if (ctrl == *mask)
|
|
|
|
break;
|
|
|
|
ctrl = *mask;
|
|
|
|
}
|
ACPI/PCI: Do not preserve _OSC control bits returned by a query
There is the assumption in acpi_pci_osc_control_set() that it is
always sufficient to compare the mask of _OSC control bits to be
requested with the result of an _OSC query where all of the known
control bits have been checked. However, in general, that need not
be the case. For example, if an _OSC feature A depends on an _OSC
feature B and control of A, B plus another _OSC feature C is
requested simultaneously, the BIOS may return A, B, C, while it would
only return C if A and C were requested without B.
That may result in passing a wrong mask of _OSC control bits to an
_OSC control request, in which case the BIOS may only grant control
of a subset of the requested features. Moreover, acpi_pci_run_osc()
will return error code if that happens and the caller of
acpi_pci_osc_control_set() will not know that it's been granted
control of some _OSC features. Consequently, the system will
generally not work as expected.
Apart from this acpi_pci_osc_control_set() always uses the mask
of _OSC control bits returned by the very first invocation of
acpi_pci_query_osc(), but that is done with the second argument
equal to OSC_PCI_SEGMENT_GROUPS_SUPPORT which generally happens
to affect the returned _OSC control bits.
For these reasons, make acpi_pci_osc_control_set() always check if
control of the requested _OSC features will be granted before making
the final control request. As a result, the osc_control_qry and
osc_queried members of struct acpi_pci_root are not necessary any
more, so drop them and remove the remaining code referring to them.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24 04:55:59 +07:00
|
|
|
|
2010-08-24 04:53:11 +07:00
|
|
|
if ((ctrl & req) != req) {
|
2009-02-09 13:59:29 +07:00
|
|
|
status = AE_SUPPORT;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
capbuf[OSC_QUERY_TYPE] = 0;
|
|
|
|
capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
|
2010-08-24 04:53:11 +07:00
|
|
|
capbuf[OSC_CONTROL_TYPE] = ctrl;
|
|
|
|
status = acpi_pci_run_osc(handle, capbuf, mask);
|
2009-02-09 13:59:29 +07:00
|
|
|
if (ACPI_SUCCESS(status))
|
2010-08-24 04:53:11 +07:00
|
|
|
root->osc_control_set = *mask;
|
2009-02-09 13:59:29 +07:00
|
|
|
out:
|
|
|
|
mutex_unlock(&osc_lock);
|
|
|
|
return status;
|
|
|
|
}
|
2009-02-09 14:00:04 +07:00
|
|
|
EXPORT_SYMBOL(acpi_pci_osc_control_set);
|
2009-02-09 13:59:29 +07:00
|
|
|
|
2008-02-17 19:23:03 +07:00
|
|
|
static int __devinit acpi_pci_root_add(struct acpi_device *device)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
2009-06-19 03:46:52 +07:00
|
|
|
unsigned long long segment, bus;
|
|
|
|
acpi_status status;
|
|
|
|
int result;
|
|
|
|
struct acpi_pci_root *root;
|
|
|
|
acpi_handle handle;
|
2006-12-21 14:21:13 +07:00
|
|
|
struct acpi_device *child;
|
2008-11-11 05:30:50 +07:00
|
|
|
u32 flags, base_flags;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2010-03-12 02:20:06 +07:00
|
|
|
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
|
|
|
|
if (!root)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2009-06-19 03:46:52 +07:00
|
|
|
segment = 0;
|
|
|
|
status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
|
|
|
|
&segment);
|
|
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
|
|
printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
|
2010-03-12 02:20:06 +07:00
|
|
|
result = -ENODEV;
|
|
|
|
goto end;
|
2009-06-19 03:46:52 +07:00
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2009-06-19 03:46:52 +07:00
|
|
|
/* Check _CRS first, then _BBN. If no _BBN, default to zero. */
|
2010-03-12 02:20:06 +07:00
|
|
|
root->secondary.flags = IORESOURCE_BUS;
|
|
|
|
status = try_get_root_bridge_busnr(device->handle, &root->secondary);
|
2009-06-19 03:46:52 +07:00
|
|
|
if (ACPI_FAILURE(status)) {
|
2010-03-12 02:20:06 +07:00
|
|
|
/*
|
|
|
|
* We need both the start and end of the downstream bus range
|
|
|
|
* to interpret _CBA (MMCONFIG base address), so it really is
|
|
|
|
* supposed to be in _CRS. If we don't find it there, all we
|
|
|
|
* can do is assume [_BBN-0xFF] or [0-0xFF].
|
|
|
|
*/
|
|
|
|
root->secondary.end = 0xFF;
|
|
|
|
printk(KERN_WARNING FW_BUG PREFIX
|
|
|
|
"no secondary bus range in _CRS\n");
|
2011-06-20 06:51:37 +07:00
|
|
|
status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
|
|
|
|
NULL, &bus);
|
2010-03-12 02:20:06 +07:00
|
|
|
if (ACPI_SUCCESS(status))
|
|
|
|
root->secondary.start = bus;
|
|
|
|
else if (status == AE_NOT_FOUND)
|
|
|
|
root->secondary.start = 0;
|
|
|
|
else {
|
|
|
|
printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
|
|
|
|
result = -ENODEV;
|
|
|
|
goto end;
|
2009-06-19 03:46:52 +07:00
|
|
|
}
|
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2009-06-19 03:46:52 +07:00
|
|
|
INIT_LIST_HEAD(&root->node);
|
2006-05-20 03:54:39 +07:00
|
|
|
root->device = device;
|
2009-06-19 03:47:07 +07:00
|
|
|
root->segment = segment & 0xFFFF;
|
2005-04-17 05:20:36 +07:00
|
|
|
strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
|
|
|
|
strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
|
2008-09-23 04:37:34 +07:00
|
|
|
device->driver_data = root;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2008-11-11 05:30:45 +07:00
|
|
|
/*
|
|
|
|
* All supported architectures that use ACPI have support for
|
|
|
|
* PCI domains, so we indicate this in _OSC support capabilities.
|
|
|
|
*/
|
2008-11-11 05:30:50 +07:00
|
|
|
flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
|
2009-02-09 13:59:29 +07:00
|
|
|
acpi_pci_osc_support(root, flags);
|
2008-11-11 05:30:45 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
/*
|
|
|
|
* TBD: Need PCI interface for enumeration/configuration of roots.
|
|
|
|
*/
|
|
|
|
|
2005-08-05 11:44:28 +07:00
|
|
|
/* TBD: Locking */
|
|
|
|
list_add_tail(&root->node, &acpi_pci_roots);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2010-03-12 02:20:06 +07:00
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
|
2005-08-05 11:44:28 +07:00
|
|
|
acpi_device_name(device), acpi_device_bid(device),
|
2010-03-12 02:20:06 +07:00
|
|
|
root->segment, &root->secondary);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Scan the Root Bridge
|
|
|
|
* --------------------
|
|
|
|
* Must do this prior to any attempt to bind the root device, as the
|
|
|
|
* PCI namespace does not get created until this call is made (and
|
|
|
|
* thus the root bridge's pci_dev does not exist).
|
|
|
|
*/
|
2010-03-12 02:20:11 +07:00
|
|
|
root->bus = pci_acpi_scan_root(root);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (!root->bus) {
|
2006-06-27 10:41:38 +07:00
|
|
|
printk(KERN_ERR PREFIX
|
|
|
|
"Bus %04x:%02x not present in PCI namespace\n",
|
2010-03-12 02:20:06 +07:00
|
|
|
root->segment, (unsigned int)root->secondary.start);
|
2005-04-17 05:20:36 +07:00
|
|
|
result = -ENODEV;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Attach ACPI-PCI Context
|
|
|
|
* -----------------------
|
|
|
|
* Thus binding the ACPI and PCI devices.
|
|
|
|
*/
|
2009-06-11 02:55:30 +07:00
|
|
|
result = acpi_pci_bind_root(device);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (result)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* PCI Routing Table
|
|
|
|
* -----------------
|
|
|
|
* Evaluate and parse _PRT, if exists.
|
|
|
|
*/
|
2006-05-20 03:54:43 +07:00
|
|
|
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (ACPI_SUCCESS(status))
|
2009-06-11 02:55:35 +07:00
|
|
|
result = acpi_pci_irq_add_prt(device->handle, root->bus);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-12-21 14:21:13 +07:00
|
|
|
/*
|
|
|
|
* Scan and bind all _ADR-Based Devices
|
|
|
|
*/
|
|
|
|
list_for_each_entry(child, &device->children, node)
|
|
|
|
acpi_pci_bridge_scan(child);
|
|
|
|
|
2008-11-11 05:30:50 +07:00
|
|
|
/* Indicate support for various _OSC capabilities. */
|
|
|
|
if (pci_ext_cfg_avail(root->bus->self))
|
|
|
|
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
|
2011-03-05 19:21:51 +07:00
|
|
|
if (pcie_aspm_support_enabled())
|
2008-11-11 05:30:55 +07:00
|
|
|
flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
|
|
|
|
OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
|
2008-11-11 05:31:05 +07:00
|
|
|
if (pci_msi_enabled())
|
|
|
|
flags |= OSC_MSI_SUPPORT;
|
2008-11-11 05:30:50 +07:00
|
|
|
if (flags != base_flags)
|
2009-02-09 13:59:29 +07:00
|
|
|
acpi_pci_osc_support(root, flags);
|
2008-11-11 05:30:50 +07:00
|
|
|
|
2011-01-07 06:55:09 +07:00
|
|
|
if (!pcie_ports_disabled
|
|
|
|
&& (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
|
|
|
|
flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
|
|
|
|
| OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
|
|
|
|
| OSC_PCI_EXPRESS_PME_CONTROL;
|
|
|
|
|
|
|
|
if (pci_aer_available()) {
|
|
|
|
if (aer_acpi_firmware_first())
|
|
|
|
dev_dbg(root->bus->bridge,
|
|
|
|
"PCIe errors handled by BIOS.\n");
|
|
|
|
else
|
|
|
|
flags |= OSC_PCI_EXPRESS_AER_CONTROL;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_info(root->bus->bridge,
|
|
|
|
"Requesting ACPI _OSC control (0x%02x)\n", flags);
|
|
|
|
|
|
|
|
status = acpi_pci_osc_control_set(device->handle, &flags,
|
|
|
|
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
|
2011-03-21 10:29:20 +07:00
|
|
|
if (ACPI_SUCCESS(status)) {
|
2011-01-07 06:55:09 +07:00
|
|
|
dev_info(root->bus->bridge,
|
|
|
|
"ACPI _OSC control (0x%02x) granted\n", flags);
|
2011-11-11 04:38:33 +07:00
|
|
|
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
|
|
|
|
/*
|
|
|
|
* We have ASPM control, but the FADT indicates
|
|
|
|
* that it's unsupported. Clear it.
|
|
|
|
*/
|
|
|
|
pcie_clear_aspm(root->bus);
|
|
|
|
}
|
2011-03-21 10:29:20 +07:00
|
|
|
} else {
|
2011-04-30 05:21:38 +07:00
|
|
|
dev_info(root->bus->bridge,
|
|
|
|
"ACPI _OSC request failed (%s), "
|
|
|
|
"returned control mask: 0x%02x\n",
|
|
|
|
acpi_format_exception(status), flags);
|
|
|
|
pr_info("ACPI _OSC control for PCIe not granted, "
|
|
|
|
"disabling ASPM\n");
|
2011-03-21 10:29:20 +07:00
|
|
|
pcie_no_aspm();
|
|
|
|
}
|
2011-04-30 05:21:38 +07:00
|
|
|
} else {
|
|
|
|
dev_info(root->bus->bridge,
|
|
|
|
"Unable to request _OSC control "
|
|
|
|
"(_OSC support mask: 0x%02x)\n", flags);
|
2011-01-07 06:55:09 +07:00
|
|
|
}
|
|
|
|
|
2010-02-18 05:44:09 +07:00
|
|
|
pci_acpi_add_bus_pm_notifier(device, root->bus);
|
|
|
|
if (device->wakeup.flags.run_wake)
|
|
|
|
device_set_run_wake(root->bus->bridge, true);
|
|
|
|
|
2009-06-19 03:46:52 +07:00
|
|
|
return 0;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2009-06-19 03:46:52 +07:00
|
|
|
end:
|
|
|
|
if (!list_empty(&root->node))
|
|
|
|
list_del(&root->node);
|
|
|
|
kfree(root);
|
2006-06-27 11:41:40 +07:00
|
|
|
return result;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
2005-08-05 11:44:28 +07:00
|
|
|
static int acpi_pci_root_start(struct acpi_device *device)
|
2005-04-28 14:25:45 +07:00
|
|
|
{
|
2009-06-19 03:46:57 +07:00
|
|
|
struct acpi_pci_root *root = acpi_driver_data(device);
|
2005-04-28 14:25:45 +07:00
|
|
|
|
2009-06-19 03:46:57 +07:00
|
|
|
pci_bus_add_devices(root->bus);
|
|
|
|
return 0;
|
2005-04-28 14:25:45 +07:00
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-08-05 11:44:28 +07:00
|
|
|
static int acpi_pci_root_remove(struct acpi_device *device, int type)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
2009-06-19 03:46:57 +07:00
|
|
|
struct acpi_pci_root *root = acpi_driver_data(device);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2010-02-18 05:44:09 +07:00
|
|
|
device_set_run_wake(root->bus->bridge, false);
|
|
|
|
pci_acpi_remove_bus_pm_notifier(device);
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
kfree(root);
|
2006-06-27 11:41:40 +07:00
|
|
|
return 0;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
2005-08-05 11:44:28 +07:00
|
|
|
static int __init acpi_pci_root_init(void)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
2011-01-17 02:44:22 +07:00
|
|
|
acpi_hest_init();
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (acpi_pci_disabled)
|
2006-06-27 11:41:40 +07:00
|
|
|
return 0;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2010-02-24 00:24:41 +07:00
|
|
|
pci_acpi_crs_quirks();
|
2005-04-17 05:20:36 +07:00
|
|
|
if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
|
2006-06-27 11:41:40 +07:00
|
|
|
return -ENODEV;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-06-27 11:41:40 +07:00
|
|
|
return 0;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(acpi_pci_root_init);
|