2008-06-10 15:30:42 -06:00
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/*
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* pci_slot.c - ACPI PCI Slot Driver
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*
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* The code here is heavily leveraged from the acpiphp module.
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* Thanks to Matthew Wilcox <matthew@wil.cx> for much guidance.
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* Thanks to Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> for code
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* review and fixes.
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*
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2008-07-17 11:13:32 -06:00
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* Copyright (C) 2007-2008 Hewlett-Packard Development Company, L.P.
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* Alex Chiang <achiang@hp.com>
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2008-06-10 15:30:42 -06:00
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*
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2013-04-11 23:44:24 -06:00
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* Copyright (C) 2013 Huawei Tech. Co., Ltd.
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* Jiang Liu <jiang.liu@huawei.com>
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*
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2008-06-10 15:30:42 -06:00
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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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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#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 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 02:04:11 -06:00
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#include <linux/slab.h>
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2008-06-10 15:30:42 -06:00
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#include <linux/types.h>
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2013-04-11 23:44:24 -06:00
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#include <linux/list.h>
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2008-06-10 15:30:42 -06:00
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#include <linux/pci.h>
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#include <linux/acpi.h>
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2009-07-06 21:40:19 -06:00
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#include <linux/dmi.h>
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2013-12-17 02:18:19 -07:00
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#include <linux/pci-acpi.h>
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2008-06-10 15:30:42 -06:00
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2012-01-12 16:02:20 -07:00
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static bool debug;
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2008-06-10 15:30:42 -06:00
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static int check_sta_before_sun;
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#define DRIVER_VERSION "0.1"
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#define DRIVER_AUTHOR "Alex Chiang <achiang@hp.com>"
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#define DRIVER_DESC "ACPI PCI Slot Detection Driver"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
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module_param(debug, bool, 0644);
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#define _COMPONENT ACPI_PCI_COMPONENT
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ACPI_MODULE_NAME("pci_slot");
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#define MY_NAME "pci_slot"
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2013-02-03 06:55:45 -07:00
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#define err(format, arg...) pr_err("%s: " format , MY_NAME , ## arg)
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#define info(format, arg...) pr_info("%s: " format , MY_NAME , ## arg)
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2008-06-10 15:30:42 -06:00
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#define dbg(format, arg...) \
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do { \
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if (debug) \
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2013-02-03 06:55:45 -07:00
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pr_debug("%s: " format, MY_NAME , ## arg); \
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2008-06-10 15:30:42 -06:00
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} while (0)
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2009-08-04 14:44:17 -06:00
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#define SLOT_NAME_SIZE 21 /* Inspired by #define in acpiphp.h */
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2008-06-10 15:30:42 -06:00
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struct acpi_pci_slot {
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struct pci_slot *pci_slot; /* corresponding pci_slot */
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struct list_head list; /* node in the list of slots */
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};
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static LIST_HEAD(slot_list);
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static DEFINE_MUTEX(slot_list_lock);
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static int
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2008-10-10 00:22:59 -06:00
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check_slot(acpi_handle handle, unsigned long long *sun)
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2008-06-10 15:30:42 -06:00
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{
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2008-07-22 12:37:17 -06:00
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int device = -1;
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2008-10-10 00:22:59 -06:00
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unsigned long long adr, sta;
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2008-06-10 15:30:42 -06:00
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acpi_status status;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
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dbg("Checking slot on path: %s\n", (char *)buffer.pointer);
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if (check_sta_before_sun) {
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/* If SxFy doesn't have _STA, we just assume it's there */
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status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
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2008-07-22 12:37:17 -06:00
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if (ACPI_SUCCESS(status) && !(sta & ACPI_STA_DEVICE_PRESENT))
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2008-06-10 15:30:42 -06:00
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goto out;
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}
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status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
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if (ACPI_FAILURE(status)) {
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dbg("_ADR returned %d on %s\n", status, (char *)buffer.pointer);
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goto out;
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}
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/* No _SUN == not a slot == bail */
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status = acpi_evaluate_integer(handle, "_SUN", NULL, sun);
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if (ACPI_FAILURE(status)) {
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dbg("_SUN returned %d on %s\n", status, (char *)buffer.pointer);
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goto out;
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}
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2008-07-22 12:37:17 -06:00
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device = (adr >> 16) & 0xffff;
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2008-06-10 15:30:42 -06:00
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out:
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kfree(buffer.pointer);
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2008-07-22 12:37:17 -06:00
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return device;
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2008-06-10 15:30:42 -06:00
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}
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/*
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2013-04-11 23:44:24 -06:00
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* Check whether handle has an associated slot and create PCI slot if it has.
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2008-06-10 15:30:42 -06:00
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*/
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static acpi_status
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register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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int device;
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2008-10-10 00:22:59 -06:00
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unsigned long long sun;
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2008-06-10 15:30:42 -06:00
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char name[SLOT_NAME_SIZE];
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struct acpi_pci_slot *slot;
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struct pci_slot *pci_slot;
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2013-04-11 23:44:24 -06:00
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struct pci_bus *pci_bus = context;
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2008-06-10 15:30:42 -06:00
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2008-07-22 12:37:17 -06:00
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device = check_slot(handle, &sun);
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if (device < 0)
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2008-06-10 15:30:42 -06:00
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return AE_OK;
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2013-04-11 23:44:24 -06:00
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/*
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* There may be multiple PCI functions associated with the same slot.
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* Check whether PCI slot has already been created for this PCI device.
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*/
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list_for_each_entry(slot, &slot_list, list) {
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pci_slot = slot->pci_slot;
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if (pci_slot->bus == pci_bus && pci_slot->number == device)
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return AE_OK;
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}
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2008-06-10 15:30:42 -06:00
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slot = kmalloc(sizeof(*slot), GFP_KERNEL);
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if (!slot) {
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err("%s: cannot allocate memory\n", __func__);
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return AE_OK;
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}
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2009-08-04 14:44:17 -06:00
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snprintf(name, sizeof(name), "%llu", sun);
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2008-10-20 17:40:52 -06:00
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pci_slot = pci_create_slot(pci_bus, device, name, NULL);
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2008-06-10 15:30:42 -06:00
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if (IS_ERR(pci_slot)) {
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err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot));
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kfree(slot);
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2008-07-17 11:13:32 -06:00
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return AE_OK;
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2008-06-10 15:30:42 -06:00
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}
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slot->pci_slot = pci_slot;
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list_add(&slot->list, &slot_list);
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2009-03-30 10:50:19 -06:00
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get_device(&pci_bus->dev);
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2008-06-10 15:30:42 -06:00
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dbg("pci_slot: %p, pci_bus: %x, device: %d, name: %s\n",
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pci_slot, pci_bus->number, device, name);
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return AE_OK;
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}
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2013-07-13 15:27:23 -06:00
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void acpi_pci_slot_enumerate(struct pci_bus *bus)
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2008-06-10 15:30:42 -06:00
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{
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2013-07-13 15:27:23 -06:00
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acpi_handle handle = ACPI_HANDLE(bus->bridge);
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if (handle) {
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mutex_lock(&slot_list_lock);
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acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
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register_slot, NULL, bus, NULL);
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mutex_unlock(&slot_list_lock);
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}
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2008-06-10 15:30:42 -06:00
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}
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2013-04-11 23:44:24 -06:00
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void acpi_pci_slot_remove(struct pci_bus *bus)
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2008-06-10 15:30:42 -06:00
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{
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struct acpi_pci_slot *slot, *tmp;
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mutex_lock(&slot_list_lock);
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list_for_each_entry_safe(slot, tmp, &slot_list, list) {
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2013-04-11 23:44:24 -06:00
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if (slot->pci_slot->bus == bus) {
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2008-06-10 15:30:42 -06:00
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list_del(&slot->list);
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pci_destroy_slot(slot->pci_slot);
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2013-04-11 23:44:24 -06:00
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put_device(&bus->dev);
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2008-06-10 15:30:42 -06:00
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kfree(slot);
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}
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}
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mutex_unlock(&slot_list_lock);
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}
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static int do_sta_before_sun(const struct dmi_system_id *d)
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{
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info("%s detected: will evaluate _STA before calling _SUN\n", d->ident);
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check_sta_before_sun = 1;
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return 0;
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}
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static struct dmi_system_id acpi_pci_slot_dmi_table[] __initdata = {
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/*
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* Fujitsu Primequest machines will return 1023 to indicate an
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* error if the _SUN method is evaluated on SxFy objects that
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* are not present (as indicated by _STA), so for those machines,
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* we want to check _STA before evaluating _SUN.
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*/
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{
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.callback = do_sta_before_sun,
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.ident = "Fujitsu PRIMEQUEST",
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.matches = {
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DMI_MATCH(DMI_BIOS_VENDOR, "FUJITSU LIMITED"),
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DMI_MATCH(DMI_BIOS_VERSION, "PRIMEQUEST"),
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},
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},
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{}
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};
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2013-01-18 09:07:42 -07:00
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void __init acpi_pci_slot_init(void)
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2008-06-10 15:30:42 -06:00
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{
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dmi_check_system(acpi_pci_slot_dmi_table);
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}
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