linux/drivers/acpi/osl.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 08:55:06 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* acpi_osl.c - OS-dependent functions ($Revision: 83 $)
*
* Copyright (C) 2000 Andrew Henroid
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (c) 2008 Intel Corporation
* Author: Matthew Wilcox <willy@linux.intel.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/lockdep.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/kmod.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/nmi.h>
#include <linux/acpi.h>
#include <linux/efi.h>
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/jiffies.h>
#include <linux/semaphore.h>
#include <linux/security.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include "acpica/accommon.h"
#include "acpica/acnamesp.h"
#include "internal.h"
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME("osl");
struct acpi_os_dpc {
acpi_osd_exec_callback function;
void *context;
2006-11-22 15:55:48 +01:00
struct work_struct work;
};
#ifdef ENABLE_DEBUGGER
#include <linux/kdb.h>
/* stuff for debugger support */
int acpi_in_debugger;
EXPORT_SYMBOL(acpi_in_debugger);
#endif /*ENABLE_DEBUGGER */
static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
u32 pm1b_ctrl);
static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
u32 val_b);
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
static struct workqueue_struct *kacpid_wq;
ACPI: created a dedicated workqueue for notify() execution HP nx6125/nx6325/... machines have a _GPE handler with an infinite loop sending Notify() events to different ACPI subsystems. Notify handler in ACPI driver is a C-routine, which may call ACPI interpreter again to get access to some ACPI variables (acpi_evaluate_xxx). On these HP machines such an evaluation changes state of some variable and lets the loop above break. In the current ACPI implementation Notify requests are being deferred to the same kacpid workqueue on which the above GPE handler with infinite loop is executing. Thus we have a deadlock -- loop will continue to spin, sending notify events, and at the same time preventing these notify events from being run on a workqueue. All notify events are deferred, thus we see increase in memory consumption noticed by author of the thread. Also as GPE handling is bloked, machines overheat. Eventually by external poll of the same acpi_evaluate, kacpid is released and all the queued notify events are free to run, thus 100% cpu utilization by kacpid for several seconds or more. To prevent all these horrors it's needed to not put notify events to kacpid workqueue by either executing them immediately or putting them on some other thread. It's dangerous to execute notify events in place, as it will put several ACPI interpreter stacks on top of each other (at least 4 in case of nx6125), thus causing kernel stack overflow. First attempt to create a new thread was done by Peter Wainwright He created a bunch of threads, which were stealing work from a kacpid workqueue. This patch appeared in 2.6.15 kernel shipped with Ubuntu 6.06 LTS. Second attempt was done by me, I created a new thread for each Notify event. This worked OK on HP nx machines, but broke Linus' Compaq n620c, by producing threads with a speed what they stopped the machine completely. Thus this patch was reverted from 18-rc2 as I remember. I re-made the patch to create second workqueue just for notify events, thus hopping it will not break Linus' machine. Patch was tested on the same HP nx machines in #5534 and #7122, but I did not received reply from Linus on a test patch sent to him. Patch went to 19-rc and was rejected with much fanfare again. There was 4th patch, which inserted schedule_timeout(1) into deferred execution of kacpid, if we had any notify requests pending, but Linus decided that it was too complex (involved either changes to workqueue to see if it's empty or atomic inc/dec). Now you see last variant which adds yield() to every GPE execution. http://bugzilla.kernel.org/show_bug.cgi?id=5534 http://bugzilla.kernel.org/show_bug.cgi?id=8385 Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2007-05-10 05:31:03 +02:00
static struct workqueue_struct *kacpi_notify_wq;
static struct workqueue_struct *kacpi_hotplug_wq;
static bool acpi_os_initialized;
unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
bool acpi_permanent_mmap = false;
/*
* This list of permanent mappings is for memory that may be accessed from
* interrupt context, where we can't do the ioremap().
*/
struct acpi_ioremap {
struct list_head list;
void __iomem *virt;
acpi_physical_address phys;
acpi_size size;
unsigned long refcount;
};
static LIST_HEAD(acpi_ioremaps);
static DEFINE_MUTEX(acpi_ioremap_lock);
#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map)
static void __init acpi_request_region (struct acpi_generic_address *gas,
unsigned int length, char *desc)
{
u64 addr;
/* Handle possible alignment issues */
memcpy(&addr, &gas->address, sizeof(addr));
if (!addr || !length)
return;
ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage This effectively reverts the following three commits: 7bc10388ccdd ACPI / resources: free memory on error in add_region_before() 0f1b414d1907 ACPI / PNP: Avoid conflicting resource reservations b9a5e5e18fbf ACPI / init: Fix the ordering of acpi_reserve_resources() (commit b9a5e5e18fbf introduced regressions some of which, but not all, were addressed by commit 0f1b414d1907 and commit 7bc10388ccdd was a fixup on top of the latter) and causes ACPI fixed hardware resources to be reserved at the fs_initcall_sync stage of system initialization. The story is as follows. First, a boot regression was reported due to an apparent resource reservation ordering change after a commit that shouldn't lead to such changes. Investigation led to the conclusion that the problem happened because acpi_reserve_resources() was executed at the device_initcall() stage of system initialization which wasn't strictly ordered with respect to driver initialization (and with respect to the initialization of the pcieport driver in particular), so a random change causing the device initcalls to be run in a different order might break things. The response to that was to attempt to run acpi_reserve_resources() as soon as we knew that ACPI would be in use (commit b9a5e5e18fbf). However, that turned out to be too early, because it caused resource reservations made by the PNP system driver to fail on at least one system and that failure was addressed by commit 0f1b414d1907. That fix still turned out to be insufficient, though, because calling acpi_reserve_resources() before the fs_initcall stage of system initialization caused a boot regression to happen on the eCAFE EC-800-H20G/S netbook. That meant that we only could call acpi_reserve_resources() at the fs_initcall initialization stage or later, but then we might just as well call it after the PNP initalization in which case commit 0f1b414d1907 wouldn't be necessary any more. For this reason, the changes made by commit 0f1b414d1907 are reverted (along with a memory leak fixup on top of that commit), the changes made by commit b9a5e5e18fbf that went too far are reverted too and acpi_reserve_resources() is changed into fs_initcall_sync, which will cause it to be executed after the PNP subsystem initialization (which is an fs_initcall) and before device initcalls (including the pcieport driver initialization) which should avoid the initial issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100581 Link: http://marc.info/?t=143092384600002&r=1&w=2 Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e18fbf "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by: Roland Dreier <roland@purestorage.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-07-04 03:09:03 +02:00
/* Resources are never freed */
if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
request_region(addr, length, desc);
else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
request_mem_region(addr, length, desc);
}
ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage This effectively reverts the following three commits: 7bc10388ccdd ACPI / resources: free memory on error in add_region_before() 0f1b414d1907 ACPI / PNP: Avoid conflicting resource reservations b9a5e5e18fbf ACPI / init: Fix the ordering of acpi_reserve_resources() (commit b9a5e5e18fbf introduced regressions some of which, but not all, were addressed by commit 0f1b414d1907 and commit 7bc10388ccdd was a fixup on top of the latter) and causes ACPI fixed hardware resources to be reserved at the fs_initcall_sync stage of system initialization. The story is as follows. First, a boot regression was reported due to an apparent resource reservation ordering change after a commit that shouldn't lead to such changes. Investigation led to the conclusion that the problem happened because acpi_reserve_resources() was executed at the device_initcall() stage of system initialization which wasn't strictly ordered with respect to driver initialization (and with respect to the initialization of the pcieport driver in particular), so a random change causing the device initcalls to be run in a different order might break things. The response to that was to attempt to run acpi_reserve_resources() as soon as we knew that ACPI would be in use (commit b9a5e5e18fbf). However, that turned out to be too early, because it caused resource reservations made by the PNP system driver to fail on at least one system and that failure was addressed by commit 0f1b414d1907. That fix still turned out to be insufficient, though, because calling acpi_reserve_resources() before the fs_initcall stage of system initialization caused a boot regression to happen on the eCAFE EC-800-H20G/S netbook. That meant that we only could call acpi_reserve_resources() at the fs_initcall initialization stage or later, but then we might just as well call it after the PNP initalization in which case commit 0f1b414d1907 wouldn't be necessary any more. For this reason, the changes made by commit 0f1b414d1907 are reverted (along with a memory leak fixup on top of that commit), the changes made by commit b9a5e5e18fbf that went too far are reverted too and acpi_reserve_resources() is changed into fs_initcall_sync, which will cause it to be executed after the PNP subsystem initialization (which is an fs_initcall) and before device initcalls (including the pcieport driver initialization) which should avoid the initial issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100581 Link: http://marc.info/?t=143092384600002&r=1&w=2 Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e18fbf "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by: Roland Dreier <roland@purestorage.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-07-04 03:09:03 +02:00
static int __init acpi_reserve_resources(void)
{
acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
"ACPI PM1a_EVT_BLK");
acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
"ACPI PM1b_EVT_BLK");
acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
"ACPI PM1a_CNT_BLK");
acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
"ACPI PM1b_CNT_BLK");
if (acpi_gbl_FADT.pm_timer_length == 4)
acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
"ACPI PM2_CNT_BLK");
/* Length of GPE blocks must be a non-negative multiple of 2 */
if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage This effectively reverts the following three commits: 7bc10388ccdd ACPI / resources: free memory on error in add_region_before() 0f1b414d1907 ACPI / PNP: Avoid conflicting resource reservations b9a5e5e18fbf ACPI / init: Fix the ordering of acpi_reserve_resources() (commit b9a5e5e18fbf introduced regressions some of which, but not all, were addressed by commit 0f1b414d1907 and commit 7bc10388ccdd was a fixup on top of the latter) and causes ACPI fixed hardware resources to be reserved at the fs_initcall_sync stage of system initialization. The story is as follows. First, a boot regression was reported due to an apparent resource reservation ordering change after a commit that shouldn't lead to such changes. Investigation led to the conclusion that the problem happened because acpi_reserve_resources() was executed at the device_initcall() stage of system initialization which wasn't strictly ordered with respect to driver initialization (and with respect to the initialization of the pcieport driver in particular), so a random change causing the device initcalls to be run in a different order might break things. The response to that was to attempt to run acpi_reserve_resources() as soon as we knew that ACPI would be in use (commit b9a5e5e18fbf). However, that turned out to be too early, because it caused resource reservations made by the PNP system driver to fail on at least one system and that failure was addressed by commit 0f1b414d1907. That fix still turned out to be insufficient, though, because calling acpi_reserve_resources() before the fs_initcall stage of system initialization caused a boot regression to happen on the eCAFE EC-800-H20G/S netbook. That meant that we only could call acpi_reserve_resources() at the fs_initcall initialization stage or later, but then we might just as well call it after the PNP initalization in which case commit 0f1b414d1907 wouldn't be necessary any more. For this reason, the changes made by commit 0f1b414d1907 are reverted (along with a memory leak fixup on top of that commit), the changes made by commit b9a5e5e18fbf that went too far are reverted too and acpi_reserve_resources() is changed into fs_initcall_sync, which will cause it to be executed after the PNP subsystem initialization (which is an fs_initcall) and before device initcalls (including the pcieport driver initialization) which should avoid the initial issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100581 Link: http://marc.info/?t=143092384600002&r=1&w=2 Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e18fbf "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by: Roland Dreier <roland@purestorage.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-07-04 03:09:03 +02:00
return 0;
}
ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage This effectively reverts the following three commits: 7bc10388ccdd ACPI / resources: free memory on error in add_region_before() 0f1b414d1907 ACPI / PNP: Avoid conflicting resource reservations b9a5e5e18fbf ACPI / init: Fix the ordering of acpi_reserve_resources() (commit b9a5e5e18fbf introduced regressions some of which, but not all, were addressed by commit 0f1b414d1907 and commit 7bc10388ccdd was a fixup on top of the latter) and causes ACPI fixed hardware resources to be reserved at the fs_initcall_sync stage of system initialization. The story is as follows. First, a boot regression was reported due to an apparent resource reservation ordering change after a commit that shouldn't lead to such changes. Investigation led to the conclusion that the problem happened because acpi_reserve_resources() was executed at the device_initcall() stage of system initialization which wasn't strictly ordered with respect to driver initialization (and with respect to the initialization of the pcieport driver in particular), so a random change causing the device initcalls to be run in a different order might break things. The response to that was to attempt to run acpi_reserve_resources() as soon as we knew that ACPI would be in use (commit b9a5e5e18fbf). However, that turned out to be too early, because it caused resource reservations made by the PNP system driver to fail on at least one system and that failure was addressed by commit 0f1b414d1907. That fix still turned out to be insufficient, though, because calling acpi_reserve_resources() before the fs_initcall stage of system initialization caused a boot regression to happen on the eCAFE EC-800-H20G/S netbook. That meant that we only could call acpi_reserve_resources() at the fs_initcall initialization stage or later, but then we might just as well call it after the PNP initalization in which case commit 0f1b414d1907 wouldn't be necessary any more. For this reason, the changes made by commit 0f1b414d1907 are reverted (along with a memory leak fixup on top of that commit), the changes made by commit b9a5e5e18fbf that went too far are reverted too and acpi_reserve_resources() is changed into fs_initcall_sync, which will cause it to be executed after the PNP subsystem initialization (which is an fs_initcall) and before device initcalls (including the pcieport driver initialization) which should avoid the initial issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100581 Link: http://marc.info/?t=143092384600002&r=1&w=2 Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e18fbf "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by: Roland Dreier <roland@purestorage.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-07-04 03:09:03 +02:00
fs_initcall_sync(acpi_reserve_resources);
void acpi_os_printf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
acpi_os_vprintf(fmt, args);
va_end(args);
}
EXPORT_SYMBOL(acpi_os_printf);
void acpi_os_vprintf(const char *fmt, va_list args)
{
static char buffer[512];
vsprintf(buffer, fmt, args);
#ifdef ENABLE_DEBUGGER
if (acpi_in_debugger) {
kdb_printf("%s", buffer);
} else {
if (printk_get_level(buffer))
printk("%s", buffer);
else
printk(KERN_CONT "%s", buffer);
}
#else
if (acpi_debugger_write_log(buffer) < 0) {
if (printk_get_level(buffer))
printk("%s", buffer);
else
printk(KERN_CONT "%s", buffer);
}
#endif
}
#ifdef CONFIG_KEXEC
static unsigned long acpi_rsdp;
static int __init setup_acpi_rsdp(char *arg)
{
return kstrtoul(arg, 16, &acpi_rsdp);
}
early_param("acpi_rsdp", setup_acpi_rsdp);
#endif
acpi_physical_address __init acpi_os_get_root_pointer(void)
{
acpi_physical_address pa;
#ifdef CONFIG_KEXEC
/*
* We may have been provided with an RSDP on the command line,
* but if a malicious user has done so they may be pointing us
* at modified ACPI tables that could alter kernel behaviour -
* so, we check the lockdown status before making use of
* it. If we trust it then also stash it in an architecture
* specific location (if appropriate) so it can be carried
* over further kexec()s.
*/
if (acpi_rsdp && !security_locked_down(LOCKDOWN_ACPI_TABLES)) {
acpi_arch_set_root_pointer(acpi_rsdp);
return acpi_rsdp;
}
#endif
pa = acpi_arch_get_root_pointer();
if (pa)
return pa;
efi: Make 'efi_enabled' a function to query EFI facilities Originally 'efi_enabled' indicated whether a kernel was booted from EFI firmware. Over time its semantics have changed, and it now indicates whether or not we are booted on an EFI machine with bit-native firmware, e.g. 64-bit kernel with 64-bit firmware. The immediate motivation for this patch is the bug report at, https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557 which details how running a platform driver on an EFI machine that is designed to run under BIOS can cause the machine to become bricked. Also, the following report, https://bugzilla.kernel.org/show_bug.cgi?id=47121 details how running said driver can also cause Machine Check Exceptions. Drivers need a new means of detecting whether they're running on an EFI machine, as sadly the expression, if (!efi_enabled) hasn't been a sufficient condition for quite some time. Users actually want to query 'efi_enabled' for different reasons - what they really want access to is the list of available EFI facilities. For instance, the x86 reboot code needs to know whether it can invoke the ResetSystem() function provided by the EFI runtime services, while the ACPI OSL code wants to know whether the EFI config tables were mapped successfully. There are also checks in some of the platform driver code to simply see if they're running on an EFI machine (which would make it a bad idea to do BIOS-y things). This patch is a prereq for the samsung-laptop fix patch. Cc: David Airlie <airlied@linux.ie> Cc: Corentin Chary <corentincj@iksaif.net> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Olof Johansson <olof@lixom.net> Cc: Peter Jones <pjones@redhat.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Steve Langasek <steve.langasek@canonical.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Konrad Rzeszutek Wilk <konrad@kernel.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: <stable@vger.kernel.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-11-14 10:42:35 +01:00
if (efi_enabled(EFI_CONFIG_TABLES)) {
if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
return efi.acpi20;
if (efi.acpi != EFI_INVALID_TABLE_ADDR)
return efi.acpi;
pr_err(PREFIX "System description tables not found\n");
} else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
acpi_find_root_pointer(&pa);
}
return pa;
}
/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
static struct acpi_ioremap *
acpi_map_lookup(acpi_physical_address phys, acpi_size size)
{
struct acpi_ioremap *map;
list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held())
if (map->phys <= phys &&
phys + size <= map->phys + map->size)
return map;
return NULL;
}
/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
static void __iomem *
acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
{
struct acpi_ioremap *map;
map = acpi_map_lookup(phys, size);
if (map)
return map->virt + (phys - map->phys);
return NULL;
}
void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
{
struct acpi_ioremap *map;
void __iomem *virt = NULL;
mutex_lock(&acpi_ioremap_lock);
map = acpi_map_lookup(phys, size);
if (map) {
virt = map->virt + (phys - map->phys);
map->refcount++;
}
mutex_unlock(&acpi_ioremap_lock);
return virt;
}
EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
static struct acpi_ioremap *
acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
{
struct acpi_ioremap *map;
list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held())
if (map->virt <= virt &&
virt + size <= map->virt + map->size)
return map;
return NULL;
}
#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
/* ioremap will take care of cache attributes */
#define should_use_kmap(pfn) 0
#else
#define should_use_kmap(pfn) page_is_ram(pfn)
#endif
static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
{
unsigned long pfn;
pfn = pg_off >> PAGE_SHIFT;
if (should_use_kmap(pfn)) {
if (pg_sz > PAGE_SIZE)
return NULL;
return (void __iomem __force *)kmap(pfn_to_page(pfn));
} else
return acpi_os_ioremap(pg_off, pg_sz);
}
static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
{
unsigned long pfn;
pfn = pg_off >> PAGE_SHIFT;
if (should_use_kmap(pfn))
kunmap(pfn_to_page(pfn));
else
iounmap(vaddr);
}
/**
* acpi_os_map_iomem - Get a virtual address for a given physical address range.
* @phys: Start of the physical address range to map.
* @size: Size of the physical address range to map.
*
* Look up the given physical address range in the list of existing ACPI memory
* mappings. If found, get a reference to it and return a pointer to it (its
* virtual address). If not found, map it, add it to that list and return a
* pointer to it.
*
* During early init (when acpi_permanent_mmap has not been set yet) this
* routine simply calls __acpi_map_table() to get the job done.
*/
void __iomem __ref
*acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
{
struct acpi_ioremap *map;
void __iomem *virt;
acpi_physical_address pg_off;
acpi_size pg_sz;
if (phys > ULONG_MAX) {
printk(KERN_ERR PREFIX "Cannot map memory that high\n");
return NULL;
}
if (!acpi_permanent_mmap)
return __acpi_map_table((unsigned long)phys, size);
mutex_lock(&acpi_ioremap_lock);
/* Check if there's a suitable mapping already. */
map = acpi_map_lookup(phys, size);
if (map) {
map->refcount++;
goto out;
}
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map) {
mutex_unlock(&acpi_ioremap_lock);
return NULL;
}
pg_off = round_down(phys, PAGE_SIZE);
pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
virt = acpi_map(pg_off, pg_sz);
if (!virt) {
mutex_unlock(&acpi_ioremap_lock);
kfree(map);
return NULL;
}
INIT_LIST_HEAD(&map->list);
map->virt = virt;
map->phys = pg_off;
map->size = pg_sz;
map->refcount = 1;
list_add_tail_rcu(&map->list, &acpi_ioremaps);
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
out:
mutex_unlock(&acpi_ioremap_lock);
return map->virt + (phys - map->phys);
}
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
{
return (void *)acpi_os_map_iomem(phys, size);
}
EXPORT_SYMBOL_GPL(acpi_os_map_memory);
/* Must be called with mutex_lock(&acpi_ioremap_lock) */
static unsigned long acpi_os_drop_map_ref(struct acpi_ioremap *map)
{
unsigned long refcount = --map->refcount;
if (!refcount)
list_del_rcu(&map->list);
return refcount;
}
static void acpi_os_map_cleanup(struct acpi_ioremap *map)
{
synchronize_rcu_expedited();
acpi_unmap(map->phys, map->virt);
kfree(map);
}
/**
* acpi_os_unmap_iomem - Drop a memory mapping reference.
* @virt: Start of the address range to drop a reference to.
* @size: Size of the address range to drop a reference to.
*
* Look up the given virtual address range in the list of existing ACPI memory
* mappings, drop a reference to it and unmap it if there are no more active
* references to it.
*
* During early init (when acpi_permanent_mmap has not been set yet) this
* routine simply calls __acpi_unmap_table() to get the job done. Since
* __acpi_unmap_table() is an __init function, the __ref annotation is needed
* here.
*/
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
{
struct acpi_ioremap *map;
unsigned long refcount;
if (!acpi_permanent_mmap) {
__acpi_unmap_table(virt, size);
return;
}
mutex_lock(&acpi_ioremap_lock);
map = acpi_map_lookup_virt(virt, size);
if (!map) {
mutex_unlock(&acpi_ioremap_lock);
WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
return;
}
refcount = acpi_os_drop_map_ref(map);
mutex_unlock(&acpi_ioremap_lock);
if (!refcount)
acpi_os_map_cleanup(map);
}
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
{
return acpi_os_unmap_iomem((void __iomem *)virt, size);
}
EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
int acpi_os_map_generic_address(struct acpi_generic_address *gas)
{
u64 addr;
void __iomem *virt;
if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
return 0;
/* Handle possible alignment issues */
memcpy(&addr, &gas->address, sizeof(addr));
if (!addr || !gas->bit_width)
return -EINVAL;
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-20 09:39:41 +02:00
virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
if (!virt)
return -EIO;
return 0;
}
EXPORT_SYMBOL(acpi_os_map_generic_address);
void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
{
u64 addr;
struct acpi_ioremap *map;
unsigned long refcount;
if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
return;
/* Handle possible alignment issues */
memcpy(&addr, &gas->address, sizeof(addr));
if (!addr || !gas->bit_width)
return;
mutex_lock(&acpi_ioremap_lock);
map = acpi_map_lookup(addr, gas->bit_width / 8);
if (!map) {
mutex_unlock(&acpi_ioremap_lock);
return;
}
refcount = acpi_os_drop_map_ref(map);
mutex_unlock(&acpi_ioremap_lock);
if (!refcount)
acpi_os_map_cleanup(map);
}
EXPORT_SYMBOL(acpi_os_unmap_generic_address);
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
{
if (!phys || !virt)
return AE_BAD_PARAMETER;
*phys = virt_to_phys(virt);
return AE_OK;
}
#endif
#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
static bool acpi_rev_override;
int __init acpi_rev_override_setup(char *str)
{
acpi_rev_override = true;
return 1;
}
__setup("acpi_rev_override", acpi_rev_override_setup);
#else
#define acpi_rev_override false
#endif
#define ACPI_MAX_OVERRIDE_LEN 100
static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
acpi_status
acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
acpi_string *new_val)
{
if (!init_val || !new_val)
return AE_BAD_PARAMETER;
*new_val = NULL;
if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
acpi_os_name);
*new_val = acpi_os_name;
}
if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
*new_val = (char *)5;
}
return AE_OK;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:55:46 +02:00
static irqreturn_t acpi_irq(int irq, void *dev_id)
{
u32 handled;
handled = (*acpi_irq_handler) (acpi_irq_context);
if (handled) {
acpi_irq_handled++;
return IRQ_HANDLED;
} else {
acpi_irq_not_handled++;
return IRQ_NONE;
}
}
acpi_status
acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
void *context)
{
unsigned int irq;
acpi_irq_stats_init();
/*
* ACPI interrupts different from the SCI in our copy of the FADT are
* not supported.
*/
if (gsi != acpi_gbl_FADT.sci_interrupt)
return AE_BAD_PARAMETER;
if (acpi_irq_handler)
return AE_ALREADY_ACQUIRED;
if (acpi_gsi_to_irq(gsi, &irq) < 0) {
printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
gsi);
return AE_OK;
}
acpi_irq_handler = handler;
acpi_irq_context = context;
if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
acpi_irq_handler = NULL;
return AE_NOT_ACQUIRED;
}
acpi_sci_irq = irq;
return AE_OK;
}
acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
{
if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
return AE_BAD_PARAMETER;
free_irq(acpi_sci_irq, acpi_irq);
acpi_irq_handler = NULL;
acpi_sci_irq = INVALID_ACPI_IRQ;
return AE_OK;
}
/*
* Running in interpreter thread context, safe to sleep
*/
void acpi_os_sleep(u64 ms)
{
msleep(ms);
}
void acpi_os_stall(u32 us)
{
while (us) {
u32 delay = 1000;
if (delay > us)
delay = us;
udelay(delay);
touch_nmi_watchdog();
us -= delay;
}
}
/*
ACPI / OSL: Use 'jiffies' as the time bassis for acpi_os_get_timer() Since acpi_os_get_timer() may be called after the timer subsystem has been suspended, use the jiffies counter instead of ktime_get(). This patch avoids that the following warning is reported during hibernation: WARNING: CPU: 0 PID: 612 at kernel/time/timekeeping.c:751 ktime_get+0x116/0x120 RIP: 0010:ktime_get+0x116/0x120 Call Trace: acpi_os_get_timer+0xe/0x30 acpi_ds_exec_begin_control_op+0x175/0x1de acpi_ds_exec_begin_op+0x2c7/0x39a acpi_ps_create_op+0x573/0x5e4 acpi_ps_parse_loop+0x349/0x1220 acpi_ps_parse_aml+0x25b/0x6da acpi_ps_execute_method+0x327/0x41b acpi_ns_evaluate+0x4e9/0x6f5 acpi_ut_evaluate_object+0xd9/0x2f2 acpi_rs_get_method_data+0x8f/0x114 acpi_walk_resources+0x122/0x1b6 acpi_pci_link_get_current.isra.2+0x157/0x280 acpi_pci_link_set+0x32f/0x4a0 irqrouter_resume+0x58/0x80 syscore_resume+0x84/0x380 hibernation_snapshot+0x20c/0x4f0 hibernate+0x22d/0x3a6 state_store+0x99/0xa0 kobj_attr_store+0x37/0x50 sysfs_kf_write+0x87/0xa0 kernfs_fop_write+0x1a5/0x240 __vfs_write+0xd2/0x410 vfs_write+0x101/0x250 ksys_write+0xab/0x120 __x64_sys_write+0x43/0x50 do_syscall_64+0x71/0x220 entry_SYSCALL_64_after_hwframe+0x49/0xbe Fixes: 164a08cee135 (ACPICA: Dispatcher: Introduce timeout mechanism for infinite loop detection) Reported-by: Fengguang Wu <fengguang.wu@intel.com> References: https://lists.01.org/pipermail/lkp/2018-April/008406.html Signed-off-by: Bart Van Assche <bvanassche@acm.org> Cc: 4.16+ <stable@vger.kernel.org> # 4.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-17 22:24:56 +02:00
* Support ACPI 3.0 AML Timer operand. Returns a 64-bit free-running,
* monotonically increasing timer with 100ns granularity. Do not use
* ktime_get() to implement this function because this function may get
* called after timekeeping has been suspended. Note: calling this function
* after timekeeping has been suspended may lead to unexpected results
* because when timekeeping is suspended the jiffies counter is not
* incremented. See also timekeeping_suspend().
*/
u64 acpi_os_get_timer(void)
{
ACPI / OSL: Use 'jiffies' as the time bassis for acpi_os_get_timer() Since acpi_os_get_timer() may be called after the timer subsystem has been suspended, use the jiffies counter instead of ktime_get(). This patch avoids that the following warning is reported during hibernation: WARNING: CPU: 0 PID: 612 at kernel/time/timekeeping.c:751 ktime_get+0x116/0x120 RIP: 0010:ktime_get+0x116/0x120 Call Trace: acpi_os_get_timer+0xe/0x30 acpi_ds_exec_begin_control_op+0x175/0x1de acpi_ds_exec_begin_op+0x2c7/0x39a acpi_ps_create_op+0x573/0x5e4 acpi_ps_parse_loop+0x349/0x1220 acpi_ps_parse_aml+0x25b/0x6da acpi_ps_execute_method+0x327/0x41b acpi_ns_evaluate+0x4e9/0x6f5 acpi_ut_evaluate_object+0xd9/0x2f2 acpi_rs_get_method_data+0x8f/0x114 acpi_walk_resources+0x122/0x1b6 acpi_pci_link_get_current.isra.2+0x157/0x280 acpi_pci_link_set+0x32f/0x4a0 irqrouter_resume+0x58/0x80 syscore_resume+0x84/0x380 hibernation_snapshot+0x20c/0x4f0 hibernate+0x22d/0x3a6 state_store+0x99/0xa0 kobj_attr_store+0x37/0x50 sysfs_kf_write+0x87/0xa0 kernfs_fop_write+0x1a5/0x240 __vfs_write+0xd2/0x410 vfs_write+0x101/0x250 ksys_write+0xab/0x120 __x64_sys_write+0x43/0x50 do_syscall_64+0x71/0x220 entry_SYSCALL_64_after_hwframe+0x49/0xbe Fixes: 164a08cee135 (ACPICA: Dispatcher: Introduce timeout mechanism for infinite loop detection) Reported-by: Fengguang Wu <fengguang.wu@intel.com> References: https://lists.01.org/pipermail/lkp/2018-April/008406.html Signed-off-by: Bart Van Assche <bvanassche@acm.org> Cc: 4.16+ <stable@vger.kernel.org> # 4.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-17 22:24:56 +02:00
return (get_jiffies_64() - INITIAL_JIFFIES) *
(ACPI_100NSEC_PER_SEC / HZ);
}
acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
{
u32 dummy;
if (!value)
value = &dummy;
*value = 0;
if (width <= 8) {
*(u8 *) value = inb(port);
} else if (width <= 16) {
*(u16 *) value = inw(port);
} else if (width <= 32) {
*(u32 *) value = inl(port);
} else {
BUG();
}
return AE_OK;
}
EXPORT_SYMBOL(acpi_os_read_port);
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
{
if (width <= 8) {
outb(value, port);
} else if (width <= 16) {
outw(value, port);
} else if (width <= 32) {
outl(value, port);
} else {
BUG();
}
return AE_OK;
}
EXPORT_SYMBOL(acpi_os_write_port);
ACPI / LPIT: Add Low Power Idle Table (LPIT) support Add functionality to read LPIT table, which provides: - Sysfs interface to read residency counters via /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us Here the count "low_power_idle_cpu_residency_us" shows the time spent by CPU package in low power state. This is read via MSR interface, which points to MSR for PKG C10. Here the count "low_power_idle_system_residency_us" show the count the system was in low power state. This is read via MMIO interface. This is mapped to SLP_S0 residency on modern Intel systems. This residency is achieved only when CPU is in PKG C10 and all functional blocks are in low power state. It is possible that none of the above counters present or anyone of the counter present or all counters present. For example: On my Kabylake system both of the above counters present. After suspend to idle these counts updated and prints: 6916179 6998564 This counter can be read by tools like turbostat to display. Or it can be used to debug, if modern systems are reaching desired low power state. - Provides an interface to read residency counter memory address This address can be used to get the base address of PMC memory mapped IO. This is utilized by intel_pmc_core driver to print more debug information. In addition, to avoid code duplication to read iomem, removed the read of iomem from acpi_os_read_memory() in osl.c and made a common function acpi_os_read_iomem(). This new function is used for reading iomem in in both osl.c and acpi_lpit.c. Link: http://www.uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-10-06 01:24:03 +02:00
int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width)
{
switch (width) {
case 8:
*(u8 *) value = readb(virt_addr);
break;
case 16:
*(u16 *) value = readw(virt_addr);
break;
case 32:
*(u32 *) value = readl(virt_addr);
break;
case 64:
*(u64 *) value = readq(virt_addr);
break;
default:
return -EINVAL;
}
return 0;
}
acpi_status
acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
{
void __iomem *virt_addr;
unsigned int size = width / 8;
bool unmap = false;
u64 dummy;
ACPI / LPIT: Add Low Power Idle Table (LPIT) support Add functionality to read LPIT table, which provides: - Sysfs interface to read residency counters via /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us Here the count "low_power_idle_cpu_residency_us" shows the time spent by CPU package in low power state. This is read via MSR interface, which points to MSR for PKG C10. Here the count "low_power_idle_system_residency_us" show the count the system was in low power state. This is read via MMIO interface. This is mapped to SLP_S0 residency on modern Intel systems. This residency is achieved only when CPU is in PKG C10 and all functional blocks are in low power state. It is possible that none of the above counters present or anyone of the counter present or all counters present. For example: On my Kabylake system both of the above counters present. After suspend to idle these counts updated and prints: 6916179 6998564 This counter can be read by tools like turbostat to display. Or it can be used to debug, if modern systems are reaching desired low power state. - Provides an interface to read residency counter memory address This address can be used to get the base address of PMC memory mapped IO. This is utilized by intel_pmc_core driver to print more debug information. In addition, to avoid code duplication to read iomem, removed the read of iomem from acpi_os_read_memory() in osl.c and made a common function acpi_os_read_iomem(). This new function is used for reading iomem in in both osl.c and acpi_lpit.c. Link: http://www.uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-10-06 01:24:03 +02:00
int error;
rcu_read_lock();
virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
if (!virt_addr) {
rcu_read_unlock();
virt_addr = acpi_os_ioremap(phys_addr, size);
if (!virt_addr)
return AE_BAD_ADDRESS;
unmap = true;
}
if (!value)
value = &dummy;
ACPI / LPIT: Add Low Power Idle Table (LPIT) support Add functionality to read LPIT table, which provides: - Sysfs interface to read residency counters via /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us Here the count "low_power_idle_cpu_residency_us" shows the time spent by CPU package in low power state. This is read via MSR interface, which points to MSR for PKG C10. Here the count "low_power_idle_system_residency_us" show the count the system was in low power state. This is read via MMIO interface. This is mapped to SLP_S0 residency on modern Intel systems. This residency is achieved only when CPU is in PKG C10 and all functional blocks are in low power state. It is possible that none of the above counters present or anyone of the counter present or all counters present. For example: On my Kabylake system both of the above counters present. After suspend to idle these counts updated and prints: 6916179 6998564 This counter can be read by tools like turbostat to display. Or it can be used to debug, if modern systems are reaching desired low power state. - Provides an interface to read residency counter memory address This address can be used to get the base address of PMC memory mapped IO. This is utilized by intel_pmc_core driver to print more debug information. In addition, to avoid code duplication to read iomem, removed the read of iomem from acpi_os_read_memory() in osl.c and made a common function acpi_os_read_iomem(). This new function is used for reading iomem in in both osl.c and acpi_lpit.c. Link: http://www.uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-10-06 01:24:03 +02:00
error = acpi_os_read_iomem(virt_addr, value, width);
BUG_ON(error);
if (unmap)
iounmap(virt_addr);
else
rcu_read_unlock();
return AE_OK;
}
acpi_status
acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
{
void __iomem *virt_addr;
unsigned int size = width / 8;
bool unmap = false;
rcu_read_lock();
virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
if (!virt_addr) {
rcu_read_unlock();
virt_addr = acpi_os_ioremap(phys_addr, size);
if (!virt_addr)
return AE_BAD_ADDRESS;
unmap = true;
}
switch (width) {
case 8:
writeb(value, virt_addr);
break;
case 16:
writew(value, virt_addr);
break;
case 32:
writel(value, virt_addr);
break;
case 64:
writeq(value, virt_addr);
break;
default:
BUG();
}
if (unmap)
iounmap(virt_addr);
else
rcu_read_unlock();
return AE_OK;
}
#ifdef CONFIG_PCI
acpi_status
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
u64 *value, u32 width)
{
int result, size;
u32 value32;
if (!value)
return AE_BAD_PARAMETER;
switch (width) {
case 8:
size = 1;
break;
case 16:
size = 2;
break;
case 32:
size = 4;
break;
default:
return AE_ERROR;
}
result = raw_pci_read(pci_id->segment, pci_id->bus,
PCI_DEVFN(pci_id->device, pci_id->function),
reg, size, &value32);
*value = value32;
return (result ? AE_ERROR : AE_OK);
}
acpi_status
acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
u64 value, u32 width)
{
int result, size;
switch (width) {
case 8:
size = 1;
break;
case 16:
size = 2;
break;
case 32:
size = 4;
break;
default:
return AE_ERROR;
}
result = raw_pci_write(pci_id->segment, pci_id->bus,
PCI_DEVFN(pci_id->device, pci_id->function),
reg, size, value);
return (result ? AE_ERROR : AE_OK);
}
#endif
2006-11-22 15:55:48 +01:00
static void acpi_os_execute_deferred(struct work_struct *work)
ACPI: created a dedicated workqueue for notify() execution HP nx6125/nx6325/... machines have a _GPE handler with an infinite loop sending Notify() events to different ACPI subsystems. Notify handler in ACPI driver is a C-routine, which may call ACPI interpreter again to get access to some ACPI variables (acpi_evaluate_xxx). On these HP machines such an evaluation changes state of some variable and lets the loop above break. In the current ACPI implementation Notify requests are being deferred to the same kacpid workqueue on which the above GPE handler with infinite loop is executing. Thus we have a deadlock -- loop will continue to spin, sending notify events, and at the same time preventing these notify events from being run on a workqueue. All notify events are deferred, thus we see increase in memory consumption noticed by author of the thread. Also as GPE handling is bloked, machines overheat. Eventually by external poll of the same acpi_evaluate, kacpid is released and all the queued notify events are free to run, thus 100% cpu utilization by kacpid for several seconds or more. To prevent all these horrors it's needed to not put notify events to kacpid workqueue by either executing them immediately or putting them on some other thread. It's dangerous to execute notify events in place, as it will put several ACPI interpreter stacks on top of each other (at least 4 in case of nx6125), thus causing kernel stack overflow. First attempt to create a new thread was done by Peter Wainwright He created a bunch of threads, which were stealing work from a kacpid workqueue. This patch appeared in 2.6.15 kernel shipped with Ubuntu 6.06 LTS. Second attempt was done by me, I created a new thread for each Notify event. This worked OK on HP nx machines, but broke Linus' Compaq n620c, by producing threads with a speed what they stopped the machine completely. Thus this patch was reverted from 18-rc2 as I remember. I re-made the patch to create second workqueue just for notify events, thus hopping it will not break Linus' machine. Patch was tested on the same HP nx machines in #5534 and #7122, but I did not received reply from Linus on a test patch sent to him. Patch went to 19-rc and was rejected with much fanfare again. There was 4th patch, which inserted schedule_timeout(1) into deferred execution of kacpid, if we had any notify requests pending, but Linus decided that it was too complex (involved either changes to workqueue to see if it's empty or atomic inc/dec). Now you see last variant which adds yield() to every GPE execution. http://bugzilla.kernel.org/show_bug.cgi?id=5534 http://bugzilla.kernel.org/show_bug.cgi?id=8385 Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2007-05-10 05:31:03 +02:00
{
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
dpc->function(dpc->context);
kfree(dpc);
}
#ifdef CONFIG_ACPI_DEBUGGER
static struct acpi_debugger acpi_debugger;
static bool acpi_debugger_initialized;
int acpi_register_debugger(struct module *owner,
const struct acpi_debugger_ops *ops)
{
int ret = 0;
mutex_lock(&acpi_debugger.lock);
if (acpi_debugger.ops) {
ret = -EBUSY;
goto err_lock;
}
acpi_debugger.owner = owner;
acpi_debugger.ops = ops;
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
EXPORT_SYMBOL(acpi_register_debugger);
void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
{
mutex_lock(&acpi_debugger.lock);
if (ops == acpi_debugger.ops) {
acpi_debugger.ops = NULL;
acpi_debugger.owner = NULL;
}
mutex_unlock(&acpi_debugger.lock);
}
EXPORT_SYMBOL(acpi_unregister_debugger);
int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
{
int ret;
int (*func)(acpi_osd_exec_callback, void *);
struct module *owner;
if (!acpi_debugger_initialized)
return -ENODEV;
mutex_lock(&acpi_debugger.lock);
if (!acpi_debugger.ops) {
ret = -ENODEV;
goto err_lock;
}
if (!try_module_get(acpi_debugger.owner)) {
ret = -ENODEV;
goto err_lock;
}
func = acpi_debugger.ops->create_thread;
owner = acpi_debugger.owner;
mutex_unlock(&acpi_debugger.lock);
ret = func(function, context);
mutex_lock(&acpi_debugger.lock);
module_put(owner);
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
ssize_t acpi_debugger_write_log(const char *msg)
{
ssize_t ret;
ssize_t (*func)(const char *);
struct module *owner;
if (!acpi_debugger_initialized)
return -ENODEV;
mutex_lock(&acpi_debugger.lock);
if (!acpi_debugger.ops) {
ret = -ENODEV;
goto err_lock;
}
if (!try_module_get(acpi_debugger.owner)) {
ret = -ENODEV;
goto err_lock;
}
func = acpi_debugger.ops->write_log;
owner = acpi_debugger.owner;
mutex_unlock(&acpi_debugger.lock);
ret = func(msg);
mutex_lock(&acpi_debugger.lock);
module_put(owner);
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
{
ssize_t ret;
ssize_t (*func)(char *, size_t);
struct module *owner;
if (!acpi_debugger_initialized)
return -ENODEV;
mutex_lock(&acpi_debugger.lock);
if (!acpi_debugger.ops) {
ret = -ENODEV;
goto err_lock;
}
if (!try_module_get(acpi_debugger.owner)) {
ret = -ENODEV;
goto err_lock;
}
func = acpi_debugger.ops->read_cmd;
owner = acpi_debugger.owner;
mutex_unlock(&acpi_debugger.lock);
ret = func(buffer, buffer_length);
mutex_lock(&acpi_debugger.lock);
module_put(owner);
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
int acpi_debugger_wait_command_ready(void)
{
int ret;
int (*func)(bool, char *, size_t);
struct module *owner;
if (!acpi_debugger_initialized)
return -ENODEV;
mutex_lock(&acpi_debugger.lock);
if (!acpi_debugger.ops) {
ret = -ENODEV;
goto err_lock;
}
if (!try_module_get(acpi_debugger.owner)) {
ret = -ENODEV;
goto err_lock;
}
func = acpi_debugger.ops->wait_command_ready;
owner = acpi_debugger.owner;
mutex_unlock(&acpi_debugger.lock);
ret = func(acpi_gbl_method_executing,
acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
mutex_lock(&acpi_debugger.lock);
module_put(owner);
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
int acpi_debugger_notify_command_complete(void)
{
int ret;
int (*func)(void);
struct module *owner;
if (!acpi_debugger_initialized)
return -ENODEV;
mutex_lock(&acpi_debugger.lock);
if (!acpi_debugger.ops) {
ret = -ENODEV;
goto err_lock;
}
if (!try_module_get(acpi_debugger.owner)) {
ret = -ENODEV;
goto err_lock;
}
func = acpi_debugger.ops->notify_command_complete;
owner = acpi_debugger.owner;
mutex_unlock(&acpi_debugger.lock);
ret = func();
mutex_lock(&acpi_debugger.lock);
module_put(owner);
err_lock:
mutex_unlock(&acpi_debugger.lock);
return ret;
}
int __init acpi_debugger_init(void)
{
mutex_init(&acpi_debugger.lock);
acpi_debugger_initialized = true;
return 0;
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_os_execute
*
* PARAMETERS: Type - Type of the callback
* Function - Function to be executed
* Context - Function parameters
*
* RETURN: Status
*
* DESCRIPTION: Depending on type, either queues function for deferred execution or
* immediately executes function on a separate thread.
*
******************************************************************************/
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
acpi_status acpi_os_execute(acpi_execute_type type,
acpi_osd_exec_callback function, void *context)
{
acpi_status status = AE_OK;
struct acpi_os_dpc *dpc;
struct workqueue_struct *queue;
int ret;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Scheduling function [%p(%p)] for deferred execution.\n",
function, context));
if (type == OSL_DEBUGGER_MAIN_THREAD) {
ret = acpi_debugger_create_thread(function, context);
if (ret) {
pr_err("Call to kthread_create() failed.\n");
status = AE_ERROR;
}
goto out_thread;
}
/*
* Allocate/initialize DPC structure. Note that this memory will be
2006-11-22 15:55:48 +01:00
* freed by the callee. The kernel handles the work_struct list in a
* way that allows us to also free its memory inside the callee.
* Because we may want to schedule several tasks with different
* parameters we can't use the approach some kernel code uses of
2006-11-22 15:55:48 +01:00
* having a static work_struct.
*/
dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
if (!dpc)
return AE_NO_MEMORY;
dpc->function = function;
dpc->context = context;
/*
* To prevent lockdep from complaining unnecessarily, make sure that
* there is a different static lockdep key for each workqueue by using
* INIT_WORK() for each of them separately.
*/
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
if (type == OSL_NOTIFY_HANDLER) {
queue = kacpi_notify_wq;
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
} else if (type == OSL_GPE_HANDLER) {
queue = kacpid_wq;
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
} else {
pr_err("Unsupported os_execute type %d.\n", type);
status = AE_ERROR;
}
if (ACPI_FAILURE(status))
goto err_workqueue;
/*
* On some machines, a software-initiated SMI causes corruption unless
* the SMI runs on CPU 0. An SMI can be initiated by any AML, but
* typically it's done in GPE-related methods that are run via
* workqueues, so we can avoid the known corruption cases by always
* queueing on CPU 0.
*/
ret = queue_work_on(0, queue, &dpc->work);
if (!ret) {
printk(KERN_ERR PREFIX
"Call to queue_work() failed.\n");
status = AE_ERROR;
}
err_workqueue:
if (ACPI_FAILURE(status))
kfree(dpc);
out_thread:
return status;
}
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
EXPORT_SYMBOL(acpi_os_execute);
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
void acpi_os_wait_events_complete(void)
{
ACPI / OSL: Add IRQ handler flushing support in the OSL. It is possible that a GPE handler or a fixed event handler still accessed after removing the handlers by invoking acpi_remove_gpe_handler() or acpi_remove_fixed_event_handler(), this possibility can crash OPSM after a module removal. In the Linux kernel, though all other GPE drivers are not modules, since the IPMI_SI (ipmi_si_intf.c) can be compiled as a module, we still need to consider a solution for this issue when the driver switches to ACPI_GPE_RAW_HANDLER mode in order to invoke GPE APIs. ACPICA expects acpi_os_wait_events_complete() to be invoked after GPE disabling so that OSPM can ensure all running GPE handlers have exitted. But currently acpi_os_wait_events_complete() can only flush _Lxx/_Exx evaluation work queue and this philosophy cannot work for drivers that have installed a dedicated GPE handler. The only way to protect a callback is to perform some state holders (reference count, state machine) before invoking the callback. Then this issue can only be fixed by the following means: 1. Flush GPE in ACPICA before invoking the GPE handler. But currently, there is no such implementation in acpi_ev_gpe_dispatch(). 2. Flush GPE in ACPICA OSL before invoking the SCI handler. But currently, there is no such implementation in acpi_irq(). 3. Flush IRQ in OSPM IRQ layer before invoking the IRQ handler. In Linus kernel, this can be done by synchronize_irq(). 4. Flush scheduling in OSPM vector entry layer before invoking the vector. In Linux, this can be done by synchronize_sched(). Since ACPICA expects the GPE handlers to be flushed by the ACPICA OSL or the GPE drivers. If it is implemented by the GPE driver, we should see synchronize_irq()/synchronize_sched() invoked in such drivers. If it is implemented by the ACPICA OSL, ACPICA currently provides acpi_os_wait_events_complete() hook to achieve this. After the following commit: Commit: 69c841b6dd8313c9a673246cc0e2535174272cab Author: Lv Zheng <lv.zheng@intel.com> Subject: ACPICA: Update use of acpi_os_wait_events_complete interface. The OSL acpi_os_wait_events_complete() is invoked after a GPE handler is removed from acpi_remove_gpe_handler() or a fixed event handler is removed from acpi_remove_fixed_event_handler(). Thus it is possible to implement GPE handler flushing using this ACPICA OSL now. So the solution 1 is currently not taken into account. By examining the IPMI_SI driver, we noticed that the IPMI_SI driver: 1. Uses free_irq() to flush non GPE based IRQ handlers, in free_irq(), synchronize_irq() is invoked, and 2. Uses acpi_remove_gpe_handler() to flush GPE based IRQ handlers, for such IRQ handlers, there is no synchronize_irq() invoked. Since there isn't synchronize_sched() implemented for this driver, from the driver's perspective, acpi_remove_gpe_handler() should have properly flushed the GPE handlers for it. Since the driver doesn't invoke synchronize_irq(), the solution 3 is not what the drivers expect. This patch implements solution 2. But since given the fact that the GPE is managed inside of ACPICA, and implementing the GPE flushing requires to implement the whole GPE management code again in the OSL, instead of flushing GPE, this patch flushes IRQ in acpi_os_wait_events_complete(). The flushing could last longer than expected as though the target GPE/fixed event that is removed can be fastly flushed, other GPEs/fix events can still be issued during the flushing period. This patch fixes this issue by invoking synchronize_hardirq() in acpi_os_wait_events_complete(). The reason why we don't invoke synchronize_irq() is: currently ACPICA is not threaded IRQ capable and the only difference between synchronize_irq() and synchronize_hardirq() is synchronize_irq() also flushes threaded IRQ handlers. Thus using synchronize_hardirq() can help to reduce the overall synchronization time for the current ACPICA implementation. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Len Brown <lenb@kernel.org> Cc: Robert Moore <robert.moore@intel.com> Cc: Corey Minyard <minyard@acm.org> Cc: linux-acpi@vger.kernel.org Cc: devel@acpica.org Cc: openipmi-developer@lists.sourceforge.net Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-05 08:06:13 +01:00
/*
* Make sure the GPE handler or the fixed event handler is not used
* on another CPU after removal.
*/
if (acpi_sci_irq_valid())
synchronize_hardirq(acpi_sci_irq);
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
flush_workqueue(kacpid_wq);
flush_workqueue(kacpi_notify_wq);
}
EXPORT_SYMBOL(acpi_os_wait_events_complete);
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
struct acpi_hp_work {
struct work_struct work;
struct acpi_device *adev;
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
u32 src;
};
static void acpi_hotplug_work_fn(struct work_struct *work)
{
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
acpi_os_wait_events_complete();
acpi_device_hotplug(hpw->adev, hpw->src);
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
kfree(hpw);
}
acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
{
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
struct acpi_hp_work *hpw;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Scheduling hotplug event (%p, %u) for deferred execution.\n",
adev, src));
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
if (!hpw)
return AE_NO_MEMORY;
INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
hpw->adev = adev;
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines There are two different interfaces for queuing up work items on the ACPI hotplug workqueue, alloc_acpi_hp_work() used by PCI and PCI host bridge hotplug code and acpi_os_hotplug_execute() used by the common ACPI hotplug code and docking stations. They both are somewhat cumbersome to use and work slightly differently. The users of alloc_acpi_hp_work() have to submit a work function that will extract the necessary data items from a struct acpi_hp_work object allocated by alloc_acpi_hp_work() and then will free that object, while it would be more straightforward to simply use a work function with one more argument and let the interface take care of the execution details. The users of acpi_os_hotplug_execute() also have to deal with the fact that it takes only one argument in addition to the work function pointer, although acpi_os_execute_deferred() actually takes care of the allocation and freeing of memory, so it would have been able to pass more arguments to the work function if it hadn't been constrained by the connection with acpi_os_execute(). Moreover, while alloc_acpi_hp_work() makes GFP_KERNEL memory allocations, which is correct, because hotplug work items are always queued up from process context, acpi_os_hotplug_execute() uses GFP_ATOMIC, as that is needed by acpi_os_execute(). Also, acpi_os_execute_deferred() queued up by it waits for the ACPI event workqueues to flush before executing the work function, whereas alloc_acpi_hp_work() can't do anything similar. That leads to somewhat arbitrary differences in behavior between various ACPI hotplug code paths and has to be straightened up. For this reason, replace both alloc_acpi_hp_work() and acpi_os_hotplug_execute() with a single interface, acpi_hotplug_execute(), combining their behavior and being more friendly to its users than any of the two. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-11-07 01:45:40 +01:00
hpw->src = src;
/*
* We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
* the hotplug code may call driver .remove() functions, which may
* invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
* these workqueues.
*/
if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
kfree(hpw);
return AE_ERROR;
}
return AE_OK;
}
bool acpi_queue_hotplug_work(struct work_struct *work)
{
return queue_work(kacpi_hotplug_wq, work);
}
acpi_status
acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
{
struct semaphore *sem = NULL;
sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
if (!sem)
return AE_NO_MEMORY;
sema_init(sem, initial_units);
*handle = (acpi_handle *) sem;
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
*handle, initial_units));
return AE_OK;
}
/*
* TODO: A better way to delete semaphores? Linux doesn't have a
* 'delete_semaphore()' function -- may result in an invalid
* pointer dereference for non-synchronized consumers. Should
* we at least check for blocked threads and signal/cancel them?
*/
acpi_status acpi_os_delete_semaphore(acpi_handle handle)
{
struct semaphore *sem = (struct semaphore *)handle;
if (!sem)
return AE_BAD_PARAMETER;
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
BUG_ON(!list_empty(&sem->wait_list));
kfree(sem);
sem = NULL;
return AE_OK;
}
/*
* TODO: Support for units > 1?
*/
acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
{
acpi_status status = AE_OK;
struct semaphore *sem = (struct semaphore *)handle;
long jiffies;
int ret = 0;
if (!acpi_os_initialized)
return AE_OK;
if (!sem || (units < 1))
return AE_BAD_PARAMETER;
if (units > 1)
return AE_SUPPORT;
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
handle, units, timeout));
if (timeout == ACPI_WAIT_FOREVER)
jiffies = MAX_SCHEDULE_TIMEOUT;
else
jiffies = msecs_to_jiffies(timeout);
ret = down_timeout(sem, jiffies);
if (ret)
status = AE_TIME;
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"Failed to acquire semaphore[%p|%d|%d], %s",
handle, units, timeout,
acpi_format_exception(status)));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"Acquired semaphore[%p|%d|%d]", handle,
units, timeout));
}
return status;
}
/*
* TODO: Support for units > 1?
*/
acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
{
struct semaphore *sem = (struct semaphore *)handle;
if (!acpi_os_initialized)
return AE_OK;
if (!sem || (units < 1))
return AE_BAD_PARAMETER;
if (units > 1)
return AE_SUPPORT;
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
units));
up(sem);
return AE_OK;
}
ACPI: Enable build of AML interpreter debugger This patch enables ACPICA debugger files using a configurable CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that was originally masked as ACPI_FUTURE_USAGE now gets unmasked. Necessary OSL stubs are also added in this patch: 1. acpi_os_readable(): This should be arch specific in Linux, while this patch doesn't introduce real implementation and a complex mechanism to allow architecture specific acpi_os_readable() to be implemented to validate the address. It may be done by future commits. 2. acpi_os_get_line(): This is used to obtain debugger command input. This patch only introduces a simple KDB concept example in it and the example should be co-working with the code implemented in acpi_os_printf(). Since this KDB example won't be compiled unless ENABLE_DEBUGGER is defined and it seems Linux has already stopped to use ENABLE_DEBUGGER, thus do not expect it can work properly. This patch also cleans up all other ACPI_FUTURE_USAGE surroundings accordingly. 1. Since linkage error can be automatically detected, declaration in the headers needn't be surrounded by ACPI_FUTURE_USAGE. So only the following separate exported fuction bodies are masked by this macro (other exported fucntions may have already been masked at entire module level via drivers/acpi/acpica/Makefile): acpi_install_exception_handler() acpi_subsystem_status() acpi_get_system_info() acpi_get_statistics() acpi_install_initialization_handler() 2. Since strip can automatically zap the no-user functions, functions that are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by ACPI_FUTURE_USAGE. So the following function which is not used by Linux kernel now won't get surrounded by this macro: acpi_ps_get_name() Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-19 04:25:56 +02:00
acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
{
#ifdef ENABLE_DEBUGGER
if (acpi_in_debugger) {
u32 chars;
ACPI: Enable build of AML interpreter debugger This patch enables ACPICA debugger files using a configurable CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that was originally masked as ACPI_FUTURE_USAGE now gets unmasked. Necessary OSL stubs are also added in this patch: 1. acpi_os_readable(): This should be arch specific in Linux, while this patch doesn't introduce real implementation and a complex mechanism to allow architecture specific acpi_os_readable() to be implemented to validate the address. It may be done by future commits. 2. acpi_os_get_line(): This is used to obtain debugger command input. This patch only introduces a simple KDB concept example in it and the example should be co-working with the code implemented in acpi_os_printf(). Since this KDB example won't be compiled unless ENABLE_DEBUGGER is defined and it seems Linux has already stopped to use ENABLE_DEBUGGER, thus do not expect it can work properly. This patch also cleans up all other ACPI_FUTURE_USAGE surroundings accordingly. 1. Since linkage error can be automatically detected, declaration in the headers needn't be surrounded by ACPI_FUTURE_USAGE. So only the following separate exported fuction bodies are masked by this macro (other exported fucntions may have already been masked at entire module level via drivers/acpi/acpica/Makefile): acpi_install_exception_handler() acpi_subsystem_status() acpi_get_system_info() acpi_get_statistics() acpi_install_initialization_handler() 2. Since strip can automatically zap the no-user functions, functions that are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by ACPI_FUTURE_USAGE. So the following function which is not used by Linux kernel now won't get surrounded by this macro: acpi_ps_get_name() Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-19 04:25:56 +02:00
kdb_read(buffer, buffer_length);
/* remove the CR kdb includes */
chars = strlen(buffer) - 1;
buffer[chars] = '\0';
}
#else
int ret;
ret = acpi_debugger_read_cmd(buffer, buffer_length);
if (ret < 0)
return AE_ERROR;
if (bytes_read)
*bytes_read = ret;
#endif
ACPI: Enable build of AML interpreter debugger This patch enables ACPICA debugger files using a configurable CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that was originally masked as ACPI_FUTURE_USAGE now gets unmasked. Necessary OSL stubs are also added in this patch: 1. acpi_os_readable(): This should be arch specific in Linux, while this patch doesn't introduce real implementation and a complex mechanism to allow architecture specific acpi_os_readable() to be implemented to validate the address. It may be done by future commits. 2. acpi_os_get_line(): This is used to obtain debugger command input. This patch only introduces a simple KDB concept example in it and the example should be co-working with the code implemented in acpi_os_printf(). Since this KDB example won't be compiled unless ENABLE_DEBUGGER is defined and it seems Linux has already stopped to use ENABLE_DEBUGGER, thus do not expect it can work properly. This patch also cleans up all other ACPI_FUTURE_USAGE surroundings accordingly. 1. Since linkage error can be automatically detected, declaration in the headers needn't be surrounded by ACPI_FUTURE_USAGE. So only the following separate exported fuction bodies are masked by this macro (other exported fucntions may have already been masked at entire module level via drivers/acpi/acpica/Makefile): acpi_install_exception_handler() acpi_subsystem_status() acpi_get_system_info() acpi_get_statistics() acpi_install_initialization_handler() 2. Since strip can automatically zap the no-user functions, functions that are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by ACPI_FUTURE_USAGE. So the following function which is not used by Linux kernel now won't get surrounded by this macro: acpi_ps_get_name() Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-19 04:25:56 +02:00
return AE_OK;
}
EXPORT_SYMBOL(acpi_os_get_line);
acpi_status acpi_os_wait_command_ready(void)
{
int ret;
ret = acpi_debugger_wait_command_ready();
if (ret < 0)
return AE_ERROR;
return AE_OK;
}
acpi_status acpi_os_notify_command_complete(void)
{
int ret;
ret = acpi_debugger_notify_command_complete();
if (ret < 0)
return AE_ERROR;
return AE_OK;
}
acpi_status acpi_os_signal(u32 function, void *info)
{
switch (function) {
case ACPI_SIGNAL_FATAL:
printk(KERN_ERR PREFIX "Fatal opcode executed\n");
break;
case ACPI_SIGNAL_BREAKPOINT:
/*
* AML Breakpoint
* ACPI spec. says to treat it as a NOP unless
* you are debugging. So if/when we integrate
* AML debugger into the kernel debugger its
* hook will go here. But until then it is
* not useful to print anything on breakpoints.
*/
break;
default:
break;
}
return AE_OK;
}
static int __init acpi_os_name_setup(char *str)
{
char *p = acpi_os_name;
int count = ACPI_MAX_OVERRIDE_LEN - 1;
if (!str || !*str)
return 0;
for (; count-- && *str; str++) {
if (isalnum(*str) || *str == ' ' || *str == ':')
*p++ = *str;
else if (*str == '\'' || *str == '"')
continue;
else
break;
}
*p = 0;
return 1;
}
__setup("acpi_os_name=", acpi_os_name_setup);
/*
* Disable the auto-serialization of named objects creation methods.
*
* This feature is enabled by default. It marks the AML control methods
* that contain the opcodes to create named objects as "Serialized".
*/
static int __init acpi_no_auto_serialize_setup(char *str)
{
acpi_gbl_auto_serialize_methods = FALSE;
pr_info("ACPI: auto-serialization disabled\n");
return 1;
}
__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
/* Check of resource interference between native drivers and ACPI
* OperationRegions (SystemIO and System Memory only).
* IO ports and memory declared in ACPI might be used by the ACPI subsystem
* in arbitrary AML code and can interfere with legacy drivers.
* acpi_enforce_resources= can be set to:
*
* - strict (default) (2)
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
* -> further driver trying to access the resources will not load
* - lax (1)
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
* -> further driver trying to access the resources will load, but you
* get a system message that something might go wrong...
*
* - no (0)
* -> ACPI Operation Region resources will not be registered
*
*/
#define ENFORCE_RESOURCES_STRICT 2
#define ENFORCE_RESOURCES_LAX 1
#define ENFORCE_RESOURCES_NO 0
static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
static int __init acpi_enforce_resources_setup(char *str)
{
if (str == NULL || *str == '\0')
return 0;
if (!strcmp("strict", str))
acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
else if (!strcmp("lax", str))
acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
else if (!strcmp("no", str))
acpi_enforce_resources = ENFORCE_RESOURCES_NO;
return 1;
}
__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
/* Check for resource conflicts between ACPI OperationRegions and native
* drivers */
int acpi_check_resource_conflict(const struct resource *res)
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
{
acpi_adr_space_type space_id;
acpi_size length;
u8 warn = 0;
int clash = 0;
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
return 0;
if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
return 0;
if (res->flags & IORESOURCE_IO)
space_id = ACPI_ADR_SPACE_SYSTEM_IO;
else
space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
length = resource_size(res);
if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
warn = 1;
clash = acpi_check_address_range(space_id, res->start, length, warn);
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
if (clash) {
if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
printk(KERN_NOTICE "ACPI: This conflict may"
" cause random problems and system"
" instability\n");
printk(KERN_INFO "ACPI: If an ACPI driver is available"
" for this device, you should use it instead of"
" the native driver\n");
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
}
if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
return -EBUSY;
}
return 0;
}
EXPORT_SYMBOL(acpi_check_resource_conflict);
ACPI: track opregion names to avoid driver resource conflicts. Small ACPICA extension to be able to store the name of operation regions in osl.c later In ACPI, AML can define accesses to IO ports and System Memory by Operation Regions. Those are not registered as done by PNPACPI using resource templates (and _CRS/_SRS methods). The IO ports and System Memory regions may get accessed by arbitrary AML code. When native drivers are accessing the same resources bad things can happen (e.g. a critical shutdown temperature of 3000 C every 2 months or so). It is not really possible to register the operation regions via request_resource, as they often overlap with pnp or other resources (e.g. statically setup IO resources below 0x100). This approach stores all Operation Region declarations (IO and System Memory only) at ACPI table parse time. It offers a similar functionality like request_region and let drivers which are known to possibly use the same IO ports and Memory which are also often used by ACPI (hwmon and i2c) check for ACPI interference. A boot parameter acpi_enforce_resources=strict/lax/no is provided, which is default set to lax: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Depending on the feedback and the kind of interferences we see, this should be set to strict at later time. Goal of this patch set is: - Identify ACPI interferences in bug reports (very hard to reproduce and to identify) - Find BIOSes for that an ACPI driver should exist for specific HW instead of a native one. - stability in general Provide acpi_check_{mem_}region. Drivers can additionally check against possible ACPI interference by also invoking this shortly before they call request_region. If -EBUSY is returned, the driver must not load. Use acpi_enforce_resources=strict/lax/no options to: - strict: let conflicting drivers fail to load with an error message - lax: let conflicting driver work normal with a warning message - no: no functional change at all Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Len Brown <lenb@kernel.org> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-05 08:31:22 +01:00
int acpi_check_region(resource_size_t start, resource_size_t n,
const char *name)
{
struct resource res = {
.start = start,
.end = start + n - 1,
.name = name,
.flags = IORESOURCE_IO,
};
return acpi_check_resource_conflict(&res);
}
EXPORT_SYMBOL(acpi_check_region);
static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
void *_res, void **return_value)
{
struct acpi_mem_space_context **mem_ctx;
union acpi_operand_object *handler_obj;
union acpi_operand_object *region_obj2;
union acpi_operand_object *region_obj;
struct resource *res = _res;
acpi_status status;
region_obj = acpi_ns_get_attached_object(handle);
if (!region_obj)
return AE_OK;
handler_obj = region_obj->region.handler;
if (!handler_obj)
return AE_OK;
if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
return AE_OK;
if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE))
return AE_OK;
region_obj2 = acpi_ns_get_secondary_object(region_obj);
if (!region_obj2)
return AE_OK;
mem_ctx = (void *)&region_obj2->extra.region_context;
if (!(mem_ctx[0]->address >= res->start &&
mem_ctx[0]->address < res->end))
return AE_OK;
status = handler_obj->address_space.setup(region_obj,
ACPI_REGION_DEACTIVATE,
NULL, (void **)mem_ctx);
if (ACPI_SUCCESS(status))
region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
return status;
}
/**
* acpi_release_memory - Release any mappings done to a memory region
* @handle: Handle to namespace node
* @res: Memory resource
* @level: A level that terminates the search
*
* Walks through @handle and unmaps all SystemMemory Operation Regions that
* overlap with @res and that have already been activated (mapped).
*
* This is a helper that allows drivers to place special requirements on memory
* region that may overlap with operation regions, primarily allowing them to
* safely map the region as non-cached memory.
*
* The unmapped Operation Regions will be automatically remapped next time they
* are called, so the drivers do not need to do anything else.
*/
acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
u32 level)
{
if (!(res->flags & IORESOURCE_MEM))
return AE_TYPE;
return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
acpi_deactivate_mem_region, NULL, res, NULL);
}
EXPORT_SYMBOL_GPL(acpi_release_memory);
/*
* Let drivers know whether the resource checks are effective
*/
int acpi_resources_are_enforced(void)
{
return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
}
EXPORT_SYMBOL(acpi_resources_are_enforced);
/*
* Deallocate the memory for a spinlock.
*/
void acpi_os_delete_lock(acpi_spinlock handle)
{
ACPI_FREE(handle);
}
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
/*
* Acquire a spinlock.
*
* handle is a pointer to the spinlock_t.
*/
ACPI: ACPICA 20060623 Implemented a new acpi_spinlock type for the OSL lock interfaces. This allows the type to be customized to the host OS for improved efficiency (since a spinlock is usually a very small object.) Implemented support for "ignored" bits in the ACPI registers. According to the ACPI specification, these bits should be preserved when writing the registers via a read/modify/write cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. http://bugzilla.kernel.org/show_bug.cgi?id=3691 Implemented the initial deployment of new OSL mutex interfaces. Since some host operating systems have separate mutex and semaphore objects, this feature was requested. The base code now uses mutexes (and the new mutex interfaces) wherever a binary semaphore was used previously. However, for the current release, the mutex interfaces are defined as macros to map them to the existing semaphore interfaces. Fixed several problems with the support for the control method SyncLevel parameter. The SyncLevel now works according to the ACPI specification and in concert with the Mutex SyncLevel parameter, since the current SyncLevel is a property of the executing thread. Mutual exclusion for control methods is now implemented with a mutex instead of a semaphore. Fixed three instances of the use of the C shift operator in the bitfield support code (exfldio.c) to avoid the use of a shift value larger than the target data width. The behavior of C compilers is undefined in this case and can cause unpredictable results, and therefore the case must be detected and avoided. (Fiodor Suietov) Added an info message whenever an SSDT or OEM table is loaded dynamically via the Load() or LoadTable() ASL operators. This should improve debugging capability since it will show exactly what tables have been loaded (beyond the tables present in the RSDT/XSDT.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-06-23 23:04:00 +02:00
acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
[ACPI] ACPICA 20060127 Implemented support in the Resource Manager to allow unresolved namestring references within resource package objects for the _PRT method. This support is in addition to the previously implemented unresolved reference support within the AML parser. If the interpreter slack mode is enabled (true on Linux unless acpi=strict), these unresolved references will be passed through to the caller as a NULL package entry. http://bugzilla.kernel.org/show_bug.cgi?id=5741 Implemented and deployed new macros and functions for error and warning messages across the subsystem. These macros are simpler and generate less code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION, ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. Implemented the acpi_cpu_flags type to simplify host OS integration of the Acquire/Release Lock OSL interfaces. Suggested by Steven Rostedt and Andrew Morton. Fixed a problem where Alias ASL operators are sometimes not correctly resolved. causing AE_AML_INTERNAL http://bugzilla.kernel.org/show_bug.cgi?id=5189 http://bugzilla.kernel.org/show_bug.cgi?id=5674 Fixed several problems with the implementation of the ConcatenateResTemplate ASL operator. As per the ACPI specification, zero length buffers are now treated as a single EndTag. One-length buffers always cause a fatal exception. Non-zero length buffers that do not end with a full 2-byte EndTag cause a fatal exception. Fixed a possible structure overwrite in the AcpiGetObjectInfo external interface. (With assistance from Thomas Renninger) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-01-27 22:43:00 +01:00
acpi_cpu_flags flags;
ACPI: ACPICA 20060623 Implemented a new acpi_spinlock type for the OSL lock interfaces. This allows the type to be customized to the host OS for improved efficiency (since a spinlock is usually a very small object.) Implemented support for "ignored" bits in the ACPI registers. According to the ACPI specification, these bits should be preserved when writing the registers via a read/modify/write cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. http://bugzilla.kernel.org/show_bug.cgi?id=3691 Implemented the initial deployment of new OSL mutex interfaces. Since some host operating systems have separate mutex and semaphore objects, this feature was requested. The base code now uses mutexes (and the new mutex interfaces) wherever a binary semaphore was used previously. However, for the current release, the mutex interfaces are defined as macros to map them to the existing semaphore interfaces. Fixed several problems with the support for the control method SyncLevel parameter. The SyncLevel now works according to the ACPI specification and in concert with the Mutex SyncLevel parameter, since the current SyncLevel is a property of the executing thread. Mutual exclusion for control methods is now implemented with a mutex instead of a semaphore. Fixed three instances of the use of the C shift operator in the bitfield support code (exfldio.c) to avoid the use of a shift value larger than the target data width. The behavior of C compilers is undefined in this case and can cause unpredictable results, and therefore the case must be detected and avoided. (Fiodor Suietov) Added an info message whenever an SSDT or OEM table is loaded dynamically via the Load() or LoadTable() ASL operators. This should improve debugging capability since it will show exactly what tables have been loaded (beyond the tables present in the RSDT/XSDT.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-06-23 23:04:00 +02:00
spin_lock_irqsave(lockp, flags);
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
return flags;
}
/*
* Release a spinlock. See above.
*/
ACPI: ACPICA 20060623 Implemented a new acpi_spinlock type for the OSL lock interfaces. This allows the type to be customized to the host OS for improved efficiency (since a spinlock is usually a very small object.) Implemented support for "ignored" bits in the ACPI registers. According to the ACPI specification, these bits should be preserved when writing the registers via a read/modify/write cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. http://bugzilla.kernel.org/show_bug.cgi?id=3691 Implemented the initial deployment of new OSL mutex interfaces. Since some host operating systems have separate mutex and semaphore objects, this feature was requested. The base code now uses mutexes (and the new mutex interfaces) wherever a binary semaphore was used previously. However, for the current release, the mutex interfaces are defined as macros to map them to the existing semaphore interfaces. Fixed several problems with the support for the control method SyncLevel parameter. The SyncLevel now works according to the ACPI specification and in concert with the Mutex SyncLevel parameter, since the current SyncLevel is a property of the executing thread. Mutual exclusion for control methods is now implemented with a mutex instead of a semaphore. Fixed three instances of the use of the C shift operator in the bitfield support code (exfldio.c) to avoid the use of a shift value larger than the target data width. The behavior of C compilers is undefined in this case and can cause unpredictable results, and therefore the case must be detected and avoided. (Fiodor Suietov) Added an info message whenever an SSDT or OEM table is loaded dynamically via the Load() or LoadTable() ASL operators. This should improve debugging capability since it will show exactly what tables have been loaded (beyond the tables present in the RSDT/XSDT.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-06-23 23:04:00 +02:00
void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
ACPI: ACPICA 20060623 Implemented a new acpi_spinlock type for the OSL lock interfaces. This allows the type to be customized to the host OS for improved efficiency (since a spinlock is usually a very small object.) Implemented support for "ignored" bits in the ACPI registers. According to the ACPI specification, these bits should be preserved when writing the registers via a read/modify/write cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. http://bugzilla.kernel.org/show_bug.cgi?id=3691 Implemented the initial deployment of new OSL mutex interfaces. Since some host operating systems have separate mutex and semaphore objects, this feature was requested. The base code now uses mutexes (and the new mutex interfaces) wherever a binary semaphore was used previously. However, for the current release, the mutex interfaces are defined as macros to map them to the existing semaphore interfaces. Fixed several problems with the support for the control method SyncLevel parameter. The SyncLevel now works according to the ACPI specification and in concert with the Mutex SyncLevel parameter, since the current SyncLevel is a property of the executing thread. Mutual exclusion for control methods is now implemented with a mutex instead of a semaphore. Fixed three instances of the use of the C shift operator in the bitfield support code (exfldio.c) to avoid the use of a shift value larger than the target data width. The behavior of C compilers is undefined in this case and can cause unpredictable results, and therefore the case must be detected and avoided. (Fiodor Suietov) Added an info message whenever an SSDT or OEM table is loaded dynamically via the Load() or LoadTable() ASL operators. This should improve debugging capability since it will show exactly what tables have been loaded (beyond the tables present in the RSDT/XSDT.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-06-23 23:04:00 +02:00
spin_unlock_irqrestore(lockp, flags);
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
}
#ifndef ACPI_USE_LOCAL_CACHE
/*******************************************************************************
*
* FUNCTION: acpi_os_create_cache
*
ACPI: ACPICA 20060421 Removed a device initialization optimization introduced in 20051216 where the _STA method was not run unless an _INI was also present for the same device. This optimization could cause problems because it could allow _INI methods to be run within a not-present device subtree (If a not-present device had no _INI, _STA would not be run, the not-present status would not be discovered, and the children of the device would be incorrectly traversed.) Implemented a new _STA optimization where namespace subtrees that do not contain _INI are identified and ignored during device initialization. Selectively running _STA can significantly improve boot time on large machines (with assistance from Len Brown.) Implemented support for the device initialization case where the returned _STA flags indicate a device not-present but functioning. In this case, _INI is not run, but the device children are examined for presence, as per the ACPI specification. Implemented an additional change to the IndexField support in order to conform to MS behavior. The value written to the Index Register is not simply a byte offset, it is a byte offset in units of the access width of the parent Index Field. (Fiodor Suietov) Defined and deployed a new OSL interface, acpi_os_validate_address(). This interface is called during the creation of all AML operation regions, and allows the host OS to exert control over what addresses it will allow the AML code to access. Operation Regions whose addresses are disallowed will cause a runtime exception when they are actually accessed (will not affect or abort table loading.) Defined and deployed a new OSL interface, acpi_os_validate_interface(). This interface allows the host OS to match the various "optional" interface/behavior strings for the _OSI predefined control method as appropriate (with assistance from Bjorn Helgaas.) Restructured and corrected various problems in the exception handling code paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod (with assistance from Takayoshi Kochi.) Modified the Linux source converter to ignore quoted string literals while converting identifiers from mixed to lower case. This will correct problems with the disassembler and other areas where such strings must not be modified. The ACPI_FUNCTION_* macros no longer require quotes around the function name. This allows the Linux source converter to convert the names, now that the converter ignores quoted strings. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 23:15:00 +02:00
* PARAMETERS: name - Ascii name for the cache
* size - Size of each cached object
* depth - Maximum depth of the cache (in objects) <ignored>
* cache - Where the new cache object is returned
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
*
ACPI: ACPICA 20060421 Removed a device initialization optimization introduced in 20051216 where the _STA method was not run unless an _INI was also present for the same device. This optimization could cause problems because it could allow _INI methods to be run within a not-present device subtree (If a not-present device had no _INI, _STA would not be run, the not-present status would not be discovered, and the children of the device would be incorrectly traversed.) Implemented a new _STA optimization where namespace subtrees that do not contain _INI are identified and ignored during device initialization. Selectively running _STA can significantly improve boot time on large machines (with assistance from Len Brown.) Implemented support for the device initialization case where the returned _STA flags indicate a device not-present but functioning. In this case, _INI is not run, but the device children are examined for presence, as per the ACPI specification. Implemented an additional change to the IndexField support in order to conform to MS behavior. The value written to the Index Register is not simply a byte offset, it is a byte offset in units of the access width of the parent Index Field. (Fiodor Suietov) Defined and deployed a new OSL interface, acpi_os_validate_address(). This interface is called during the creation of all AML operation regions, and allows the host OS to exert control over what addresses it will allow the AML code to access. Operation Regions whose addresses are disallowed will cause a runtime exception when they are actually accessed (will not affect or abort table loading.) Defined and deployed a new OSL interface, acpi_os_validate_interface(). This interface allows the host OS to match the various "optional" interface/behavior strings for the _OSI predefined control method as appropriate (with assistance from Bjorn Helgaas.) Restructured and corrected various problems in the exception handling code paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod (with assistance from Takayoshi Kochi.) Modified the Linux source converter to ignore quoted string literals while converting identifiers from mixed to lower case. This will correct problems with the disassembler and other areas where such strings must not be modified. The ACPI_FUNCTION_* macros no longer require quotes around the function name. This allows the Linux source converter to convert the names, now that the converter ignores quoted strings. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 23:15:00 +02:00
* RETURN: status
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
*
* DESCRIPTION: Create a cache object
*
******************************************************************************/
acpi_status
acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
*cache = kmem_cache_create(name, size, 0, 0, NULL);
if (*cache == NULL)
ACPI: ACPICA 20060421 Removed a device initialization optimization introduced in 20051216 where the _STA method was not run unless an _INI was also present for the same device. This optimization could cause problems because it could allow _INI methods to be run within a not-present device subtree (If a not-present device had no _INI, _STA would not be run, the not-present status would not be discovered, and the children of the device would be incorrectly traversed.) Implemented a new _STA optimization where namespace subtrees that do not contain _INI are identified and ignored during device initialization. Selectively running _STA can significantly improve boot time on large machines (with assistance from Len Brown.) Implemented support for the device initialization case where the returned _STA flags indicate a device not-present but functioning. In this case, _INI is not run, but the device children are examined for presence, as per the ACPI specification. Implemented an additional change to the IndexField support in order to conform to MS behavior. The value written to the Index Register is not simply a byte offset, it is a byte offset in units of the access width of the parent Index Field. (Fiodor Suietov) Defined and deployed a new OSL interface, acpi_os_validate_address(). This interface is called during the creation of all AML operation regions, and allows the host OS to exert control over what addresses it will allow the AML code to access. Operation Regions whose addresses are disallowed will cause a runtime exception when they are actually accessed (will not affect or abort table loading.) Defined and deployed a new OSL interface, acpi_os_validate_interface(). This interface allows the host OS to match the various "optional" interface/behavior strings for the _OSI predefined control method as appropriate (with assistance from Bjorn Helgaas.) Restructured and corrected various problems in the exception handling code paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod (with assistance from Takayoshi Kochi.) Modified the Linux source converter to ignore quoted string literals while converting identifiers from mixed to lower case. This will correct problems with the disassembler and other areas where such strings must not be modified. The ACPI_FUNCTION_* macros no longer require quotes around the function name. This allows the Linux source converter to convert the names, now that the converter ignores quoted strings. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 23:15:00 +02:00
return AE_ERROR;
else
return AE_OK;
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
}
/*******************************************************************************
*
* FUNCTION: acpi_os_purge_cache
*
* PARAMETERS: Cache - Handle to cache object
*
* RETURN: Status
*
* DESCRIPTION: Free all objects within the requested cache.
*
******************************************************************************/
acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
kmem_cache_shrink(cache);
return (AE_OK);
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
}
/*******************************************************************************
*
* FUNCTION: acpi_os_delete_cache
*
* PARAMETERS: Cache - Handle to cache object
*
* RETURN: Status
*
* DESCRIPTION: Free all objects within the requested cache and delete the
* cache object.
*
******************************************************************************/
acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
kmem_cache_destroy(cache);
return (AE_OK);
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
}
/*******************************************************************************
*
* FUNCTION: acpi_os_release_object
*
* PARAMETERS: Cache - Handle to cache object
* Object - The object to be released
*
* RETURN: None
*
* DESCRIPTION: Release an object to the specified cache. If cache is full,
* the object is deleted.
*
******************************************************************************/
acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
{
kmem_cache_free(cache, object);
return (AE_OK);
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 06:00:00 +02:00
}
#endif
static int __init acpi_no_static_ssdt_setup(char *s)
{
acpi_gbl_disable_ssdt_table_install = TRUE;
pr_info("ACPI: static SSDT installation disabled\n");
return 0;
}
early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
ACPICA: Add boot option to disable auto return object repair Sometimes, there might be bugs caused by unexpected AML which is compliant to the Windows but not compliant to the Linux implementation. There is a predefined validation mechanism implemented in ACPICA to repair the unexpected AML evaluation results that are caused by the unexpected AMLs. For example, BIOS may return misorder _CST result and the repair mechanism can make an ascending order on the returned _CST package object based on the C-state type. This mechanism is quite useful to implement an AML interpreter with better compliance with the real world where Windows is the de-facto standard and BIOS codes are only tested on one platform thus not compliant to the ACPI specification. But if a compliance issue hasn't been figured out yet, it will be difficult for developers to identify if the unexpected evaluation result is caused by this mechanism or by the AML interpreter. For example, _PR0 is expected to be a control method, but BIOS may use Package: "Name(_PR0, Package(1) {P1PR})". This boot option can disable the predefined validation mechanism so that developers can make sure the root cause comes from the parser/executer. This patch adds a new kernel parameter to disable this feature. A build test has been made on a Dell Inspiron mini 1100 (i386 z530) machine when this patch is applied and the corresponding boot test is performed w/ or w/o the new kernel parameter specified. References: https://bugzilla.kernel.org/show_bug.cgi?id=67901 Tested-by: Fabian Wehning <fabian.wehning@googlemail.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-02-11 04:01:52 +01:00
static int __init acpi_disable_return_repair(char *s)
{
printk(KERN_NOTICE PREFIX
"ACPI: Predefined validation mechanism disabled\n");
acpi_gbl_disable_auto_repair = TRUE;
return 1;
}
__setup("acpica_no_return_repair", acpi_disable_return_repair);
acpi_status __init acpi_os_initialize(void)
{
acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
/*
* Use acpi_os_map_generic_address to pre-map the reset
* register if it's in system memory.
*/
int rv;
rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
}
acpi_os_initialized = true;
return AE_OK;
}
acpi_status __init acpi_os_initialize1(void)
{
kacpid_wq = alloc_workqueue("kacpid", 0, 1);
kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
BUG_ON(!kacpid_wq);
BUG_ON(!kacpi_notify_wq);
BUG_ON(!kacpi_hotplug_wq);
acpi_osi_init();
return AE_OK;
}
acpi_status acpi_os_terminate(void)
{
if (acpi_irq_handler) {
acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
acpi_irq_handler);
}
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
destroy_workqueue(kacpid_wq);
destroy_workqueue(kacpi_notify_wq);
destroy_workqueue(kacpi_hotplug_wq);
return AE_OK;
}
acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
u32 pm1b_control)
{
int rc = 0;
if (__acpi_os_prepare_sleep)
rc = __acpi_os_prepare_sleep(sleep_state,
pm1a_control, pm1b_control);
if (rc < 0)
return AE_ERROR;
else if (rc > 0)
return AE_CTRL_TERMINATE;
return AE_OK;
}
void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
u32 pm1a_ctrl, u32 pm1b_ctrl))
{
__acpi_os_prepare_sleep = func;
}
#if (ACPI_REDUCED_HARDWARE)
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
u32 val_b)
{
int rc = 0;
if (__acpi_os_prepare_extended_sleep)
rc = __acpi_os_prepare_extended_sleep(sleep_state,
val_a, val_b);
if (rc < 0)
return AE_ERROR;
else if (rc > 0)
return AE_CTRL_TERMINATE;
return AE_OK;
}
#else
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
u32 val_b)
{
return AE_OK;
}
#endif
void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
u32 val_a, u32 val_b))
{
__acpi_os_prepare_extended_sleep = func;
}
acpi_status acpi_os_enter_sleep(u8 sleep_state,
u32 reg_a_value, u32 reg_b_value)
{
acpi_status status;
if (acpi_gbl_reduced_hardware)
status = acpi_os_prepare_extended_sleep(sleep_state,
reg_a_value,
reg_b_value);
else
status = acpi_os_prepare_sleep(sleep_state,
reg_a_value, reg_b_value);
return status;
}