mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-07 21:16:40 +07:00
90253a792e
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: 69c841b6dd
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>
1921 lines
45 KiB
C
1921 lines
45 KiB
C
/*
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* acpi_osl.c - OS-dependent functions ($Revision: 83 $)
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*
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* Copyright (C) 2000 Andrew Henroid
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (c) 2008 Intel Corporation
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* Author: Matthew Wilcox <willy@linux.intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/kmod.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/nmi.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/jiffies.h>
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#include <linux/semaphore.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "internal.h"
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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struct acpi_os_dpc {
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acpi_osd_exec_callback function;
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void *context;
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struct work_struct work;
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};
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#ifdef CONFIG_ACPI_CUSTOM_DSDT
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#include CONFIG_ACPI_CUSTOM_DSDT_FILE
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#endif
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#ifdef ENABLE_DEBUGGER
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#include <linux/kdb.h>
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/* stuff for debugger support */
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int acpi_in_debugger;
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EXPORT_SYMBOL(acpi_in_debugger);
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extern char line_buf[80];
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#endif /*ENABLE_DEBUGGER */
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static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
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u32 pm1b_ctrl);
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static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
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u32 val_b);
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static acpi_osd_handler acpi_irq_handler;
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static void *acpi_irq_context;
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static struct workqueue_struct *kacpid_wq;
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static struct workqueue_struct *kacpi_notify_wq;
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static struct workqueue_struct *kacpi_hotplug_wq;
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/*
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* This list of permanent mappings is for memory that may be accessed from
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* interrupt context, where we can't do the ioremap().
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*/
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struct acpi_ioremap {
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struct list_head list;
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void __iomem *virt;
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acpi_physical_address phys;
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acpi_size size;
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unsigned long refcount;
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};
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static LIST_HEAD(acpi_ioremaps);
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static DEFINE_MUTEX(acpi_ioremap_lock);
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static void __init acpi_osi_setup_late(void);
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/*
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* The story of _OSI(Linux)
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*
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* From pre-history through Linux-2.6.22,
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* Linux responded TRUE upon a BIOS OSI(Linux) query.
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*
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* Unfortunately, reference BIOS writers got wind of this
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* and put OSI(Linux) in their example code, quickly exposing
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* this string as ill-conceived and opening the door to
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* an un-bounded number of BIOS incompatibilities.
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*
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* For example, OSI(Linux) was used on resume to re-POST a
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* video card on one system, because Linux at that time
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* could not do a speedy restore in its native driver.
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* But then upon gaining quick native restore capability,
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* Linux has no way to tell the BIOS to skip the time-consuming
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* POST -- putting Linux at a permanent performance disadvantage.
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* On another system, the BIOS writer used OSI(Linux)
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* to infer native OS support for IPMI! On other systems,
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* OSI(Linux) simply got in the way of Linux claiming to
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* be compatible with other operating systems, exposing
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* BIOS issues such as skipped device initialization.
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*
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* So "Linux" turned out to be a really poor chose of
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* OSI string, and from Linux-2.6.23 onward we respond FALSE.
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*
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* BIOS writers should NOT query _OSI(Linux) on future systems.
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* Linux will complain on the console when it sees it, and return FALSE.
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* To get Linux to return TRUE for your system will require
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* a kernel source update to add a DMI entry,
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* or boot with "acpi_osi=Linux"
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*/
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static struct osi_linux {
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unsigned int enable:1;
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unsigned int dmi:1;
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unsigned int cmdline:1;
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unsigned int default_disabling:1;
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} osi_linux = {0, 0, 0, 0};
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static u32 acpi_osi_handler(acpi_string interface, u32 supported)
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{
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if (!strcmp("Linux", interface)) {
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printk_once(KERN_NOTICE FW_BUG PREFIX
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"BIOS _OSI(Linux) query %s%s\n",
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osi_linux.enable ? "honored" : "ignored",
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osi_linux.cmdline ? " via cmdline" :
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osi_linux.dmi ? " via DMI" : "");
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}
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if (!strcmp("Darwin", interface)) {
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/*
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* Apple firmware will behave poorly if it receives positive
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* answers to "Darwin" and any other OS. Respond positively
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* to Darwin and then disable all other vendor strings.
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*/
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acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
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supported = ACPI_UINT32_MAX;
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}
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return supported;
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}
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static void __init acpi_request_region (struct acpi_generic_address *gas,
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unsigned int length, char *desc)
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{
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u64 addr;
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/* Handle possible alignment issues */
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memcpy(&addr, &gas->address, sizeof(addr));
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if (!addr || !length)
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return;
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/* Resources are never freed */
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if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
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request_region(addr, length, desc);
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else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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request_mem_region(addr, length, desc);
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}
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static int __init acpi_reserve_resources(void)
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{
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acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
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"ACPI PM1a_EVT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
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"ACPI PM1b_EVT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
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"ACPI PM1a_CNT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
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"ACPI PM1b_CNT_BLK");
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if (acpi_gbl_FADT.pm_timer_length == 4)
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acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
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acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
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"ACPI PM2_CNT_BLK");
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/* Length of GPE blocks must be a non-negative multiple of 2 */
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if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
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acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
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acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
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if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
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acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
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acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
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return 0;
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}
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device_initcall(acpi_reserve_resources);
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void acpi_os_printf(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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acpi_os_vprintf(fmt, args);
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va_end(args);
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}
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void acpi_os_vprintf(const char *fmt, va_list args)
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{
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static char buffer[512];
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vsprintf(buffer, fmt, args);
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#ifdef ENABLE_DEBUGGER
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if (acpi_in_debugger) {
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kdb_printf("%s", buffer);
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} else {
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printk(KERN_CONT "%s", buffer);
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}
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#else
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printk(KERN_CONT "%s", buffer);
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#endif
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}
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#ifdef CONFIG_KEXEC
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static unsigned long acpi_rsdp;
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static int __init setup_acpi_rsdp(char *arg)
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{
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if (kstrtoul(arg, 16, &acpi_rsdp))
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return -EINVAL;
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return 0;
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}
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early_param("acpi_rsdp", setup_acpi_rsdp);
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#endif
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acpi_physical_address __init acpi_os_get_root_pointer(void)
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{
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#ifdef CONFIG_KEXEC
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if (acpi_rsdp)
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return acpi_rsdp;
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#endif
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if (efi_enabled(EFI_CONFIG_TABLES)) {
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if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
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return efi.acpi20;
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else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
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return efi.acpi;
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else {
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printk(KERN_ERR PREFIX
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"System description tables not found\n");
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return 0;
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}
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} else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
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acpi_physical_address pa = 0;
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acpi_find_root_pointer(&pa);
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return pa;
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}
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return 0;
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}
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
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acpi_map_lookup(acpi_physical_address phys, acpi_size size)
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{
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struct acpi_ioremap *map;
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list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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if (map->phys <= phys &&
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phys + size <= map->phys + map->size)
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return map;
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return NULL;
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}
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static void __iomem *
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acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
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{
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struct acpi_ioremap *map;
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map = acpi_map_lookup(phys, size);
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if (map)
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return map->virt + (phys - map->phys);
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return NULL;
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}
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void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt = NULL;
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup(phys, size);
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if (map) {
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virt = map->virt + (phys - map->phys);
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map->refcount++;
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}
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mutex_unlock(&acpi_ioremap_lock);
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return virt;
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}
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EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
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acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
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{
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struct acpi_ioremap *map;
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list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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if (map->virt <= virt &&
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virt + size <= map->virt + map->size)
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return map;
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return NULL;
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}
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#ifndef CONFIG_IA64
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#define should_use_kmap(pfn) page_is_ram(pfn)
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#else
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/* ioremap will take care of cache attributes */
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#define should_use_kmap(pfn) 0
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#endif
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static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
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{
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unsigned long pfn;
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pfn = pg_off >> PAGE_SHIFT;
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if (should_use_kmap(pfn)) {
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if (pg_sz > PAGE_SIZE)
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return NULL;
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return (void __iomem __force *)kmap(pfn_to_page(pfn));
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} else
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return acpi_os_ioremap(pg_off, pg_sz);
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}
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static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
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{
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unsigned long pfn;
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pfn = pg_off >> PAGE_SHIFT;
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if (should_use_kmap(pfn))
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kunmap(pfn_to_page(pfn));
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else
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iounmap(vaddr);
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}
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void __iomem *__init_refok
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acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt;
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acpi_physical_address pg_off;
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acpi_size pg_sz;
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if (phys > ULONG_MAX) {
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printk(KERN_ERR PREFIX "Cannot map memory that high\n");
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return NULL;
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}
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if (!acpi_gbl_permanent_mmap)
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return __acpi_map_table((unsigned long)phys, size);
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mutex_lock(&acpi_ioremap_lock);
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/* Check if there's a suitable mapping already. */
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map = acpi_map_lookup(phys, size);
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if (map) {
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map->refcount++;
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goto out;
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}
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map = kzalloc(sizeof(*map), GFP_KERNEL);
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if (!map) {
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mutex_unlock(&acpi_ioremap_lock);
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return NULL;
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}
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pg_off = round_down(phys, PAGE_SIZE);
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pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
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virt = acpi_map(pg_off, pg_sz);
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if (!virt) {
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mutex_unlock(&acpi_ioremap_lock);
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kfree(map);
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return NULL;
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}
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INIT_LIST_HEAD(&map->list);
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map->virt = virt;
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map->phys = pg_off;
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map->size = pg_sz;
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map->refcount = 1;
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list_add_tail_rcu(&map->list, &acpi_ioremaps);
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out:
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mutex_unlock(&acpi_ioremap_lock);
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return map->virt + (phys - map->phys);
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}
|
|
EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
|
|
|
|
void *__init_refok
|
|
acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
|
|
{
|
|
return (void *)acpi_os_map_iomem(phys, size);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_os_map_memory);
|
|
|
|
static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
|
|
{
|
|
if (!--map->refcount)
|
|
list_del_rcu(&map->list);
|
|
}
|
|
|
|
static void acpi_os_map_cleanup(struct acpi_ioremap *map)
|
|
{
|
|
if (!map->refcount) {
|
|
synchronize_rcu_expedited();
|
|
acpi_unmap(map->phys, map->virt);
|
|
kfree(map);
|
|
}
|
|
}
|
|
|
|
void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
|
|
{
|
|
struct acpi_ioremap *map;
|
|
|
|
if (!acpi_gbl_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;
|
|
}
|
|
acpi_os_drop_map_ref(map);
|
|
mutex_unlock(&acpi_ioremap_lock);
|
|
|
|
acpi_os_map_cleanup(map);
|
|
}
|
|
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);
|
|
|
|
void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
|
|
{
|
|
if (!acpi_gbl_permanent_mmap)
|
|
__acpi_unmap_table(virt, size);
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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;
|
|
}
|
|
acpi_os_drop_map_ref(map);
|
|
mutex_unlock(&acpi_ioremap_lock);
|
|
|
|
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
|
|
|
|
#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;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
|
|
#include <linux/earlycpio.h>
|
|
#include <linux/memblock.h>
|
|
|
|
static u64 acpi_tables_addr;
|
|
static int all_tables_size;
|
|
|
|
/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
|
|
static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
|
|
{
|
|
u8 sum = 0;
|
|
u8 *end = buffer + length;
|
|
|
|
while (buffer < end)
|
|
sum = (u8) (sum + *(buffer++));
|
|
return sum;
|
|
}
|
|
|
|
/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
|
|
static const char * const table_sigs[] = {
|
|
ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
|
|
ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
|
|
ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
|
|
ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
|
|
ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
|
|
ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
|
|
ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
|
|
ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
|
|
ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
|
|
|
|
#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
|
|
|
|
#define ACPI_OVERRIDE_TABLES 64
|
|
static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
|
|
|
|
#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
|
|
|
|
void __init acpi_initrd_override(void *data, size_t size)
|
|
{
|
|
int sig, no, table_nr = 0, total_offset = 0;
|
|
long offset = 0;
|
|
struct acpi_table_header *table;
|
|
char cpio_path[32] = "kernel/firmware/acpi/";
|
|
struct cpio_data file;
|
|
|
|
if (data == NULL || size == 0)
|
|
return;
|
|
|
|
for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
|
|
file = find_cpio_data(cpio_path, data, size, &offset);
|
|
if (!file.data)
|
|
break;
|
|
|
|
data += offset;
|
|
size -= offset;
|
|
|
|
if (file.size < sizeof(struct acpi_table_header)) {
|
|
pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
|
|
table = file.data;
|
|
|
|
for (sig = 0; table_sigs[sig]; sig++)
|
|
if (!memcmp(table->signature, table_sigs[sig], 4))
|
|
break;
|
|
|
|
if (!table_sigs[sig]) {
|
|
pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
if (file.size != table->length) {
|
|
pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
if (acpi_table_checksum(file.data, table->length)) {
|
|
pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
|
|
pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
|
|
table->signature, cpio_path, file.name, table->length);
|
|
|
|
all_tables_size += table->length;
|
|
acpi_initrd_files[table_nr].data = file.data;
|
|
acpi_initrd_files[table_nr].size = file.size;
|
|
table_nr++;
|
|
}
|
|
if (table_nr == 0)
|
|
return;
|
|
|
|
acpi_tables_addr =
|
|
memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
|
|
all_tables_size, PAGE_SIZE);
|
|
if (!acpi_tables_addr) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
/*
|
|
* Only calling e820_add_reserve does not work and the
|
|
* tables are invalid (memory got used) later.
|
|
* memblock_reserve works as expected and the tables won't get modified.
|
|
* But it's not enough on X86 because ioremap will
|
|
* complain later (used by acpi_os_map_memory) that the pages
|
|
* that should get mapped are not marked "reserved".
|
|
* Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
|
|
* works fine.
|
|
*/
|
|
memblock_reserve(acpi_tables_addr, all_tables_size);
|
|
arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
|
|
|
|
/*
|
|
* early_ioremap only can remap 256k one time. If we map all
|
|
* tables one time, we will hit the limit. Need to map chunks
|
|
* one by one during copying the same as that in relocate_initrd().
|
|
*/
|
|
for (no = 0; no < table_nr; no++) {
|
|
unsigned char *src_p = acpi_initrd_files[no].data;
|
|
phys_addr_t size = acpi_initrd_files[no].size;
|
|
phys_addr_t dest_addr = acpi_tables_addr + total_offset;
|
|
phys_addr_t slop, clen;
|
|
char *dest_p;
|
|
|
|
total_offset += size;
|
|
|
|
while (size) {
|
|
slop = dest_addr & ~PAGE_MASK;
|
|
clen = size;
|
|
if (clen > MAP_CHUNK_SIZE - slop)
|
|
clen = MAP_CHUNK_SIZE - slop;
|
|
dest_p = early_ioremap(dest_addr & PAGE_MASK,
|
|
clen + slop);
|
|
memcpy(dest_p + slop, src_p, clen);
|
|
early_iounmap(dest_p, clen + slop);
|
|
src_p += clen;
|
|
dest_addr += clen;
|
|
size -= clen;
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
|
|
|
|
static void acpi_table_taint(struct acpi_table_header *table)
|
|
{
|
|
pr_warn(PREFIX
|
|
"Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
|
|
table->signature, table->oem_table_id);
|
|
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
|
|
}
|
|
|
|
|
|
acpi_status
|
|
acpi_os_table_override(struct acpi_table_header * existing_table,
|
|
struct acpi_table_header ** new_table)
|
|
{
|
|
if (!existing_table || !new_table)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
*new_table = NULL;
|
|
|
|
#ifdef CONFIG_ACPI_CUSTOM_DSDT
|
|
if (strncmp(existing_table->signature, "DSDT", 4) == 0)
|
|
*new_table = (struct acpi_table_header *)AmlCode;
|
|
#endif
|
|
if (*new_table != NULL)
|
|
acpi_table_taint(existing_table);
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_physical_table_override(struct acpi_table_header *existing_table,
|
|
acpi_physical_address *address,
|
|
u32 *table_length)
|
|
{
|
|
#ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
|
|
*table_length = 0;
|
|
*address = 0;
|
|
return AE_OK;
|
|
#else
|
|
int table_offset = 0;
|
|
struct acpi_table_header *table;
|
|
|
|
*table_length = 0;
|
|
*address = 0;
|
|
|
|
if (!acpi_tables_addr)
|
|
return AE_OK;
|
|
|
|
do {
|
|
if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
|
|
WARN_ON(1);
|
|
return AE_OK;
|
|
}
|
|
|
|
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
|
|
ACPI_HEADER_SIZE);
|
|
|
|
if (table_offset + table->length > all_tables_size) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
WARN_ON(1);
|
|
return AE_OK;
|
|
}
|
|
|
|
table_offset += table->length;
|
|
|
|
if (memcmp(existing_table->signature, table->signature, 4)) {
|
|
acpi_os_unmap_memory(table,
|
|
ACPI_HEADER_SIZE);
|
|
continue;
|
|
}
|
|
|
|
/* Only override tables with matching oem id */
|
|
if (memcmp(table->oem_table_id, existing_table->oem_table_id,
|
|
ACPI_OEM_TABLE_ID_SIZE)) {
|
|
acpi_os_unmap_memory(table,
|
|
ACPI_HEADER_SIZE);
|
|
continue;
|
|
}
|
|
|
|
table_offset -= table->length;
|
|
*table_length = table->length;
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
*address = acpi_tables_addr + table_offset;
|
|
break;
|
|
} while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
|
|
|
|
if (*address != 0)
|
|
acpi_table_taint(existing_table);
|
|
return AE_OK;
|
|
#endif
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
|
|
{
|
|
if (irq != acpi_gbl_FADT.sci_interrupt)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
free_irq(irq, acpi_irq);
|
|
acpi_irq_handler = NULL;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Support ACPI 3.0 AML Timer operand
|
|
* Returns 64-bit free-running, monotonically increasing timer
|
|
* with 100ns granularity
|
|
*/
|
|
u64 acpi_os_get_timer(void)
|
|
{
|
|
u64 time_ns = ktime_to_ns(ktime_get());
|
|
do_div(time_ns, 100);
|
|
return time_ns;
|
|
}
|
|
|
|
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);
|
|
|
|
#ifdef readq
|
|
static inline u64 read64(const volatile void __iomem *addr)
|
|
{
|
|
return readq(addr);
|
|
}
|
|
#else
|
|
static inline u64 read64(const volatile void __iomem *addr)
|
|
{
|
|
u64 l, h;
|
|
l = readl(addr);
|
|
h = readl(addr+4);
|
|
return l | (h << 32);
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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 = read64(virt_addr);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (unmap)
|
|
iounmap(virt_addr);
|
|
else
|
|
rcu_read_unlock();
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
#ifdef writeq
|
|
static inline void write64(u64 val, volatile void __iomem *addr)
|
|
{
|
|
writeq(val, addr);
|
|
}
|
|
#else
|
|
static inline void write64(u64 val, volatile void __iomem *addr)
|
|
{
|
|
writel(val, addr);
|
|
writel(val>>32, addr+4);
|
|
}
|
|
#endif
|
|
|
|
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:
|
|
write64(value, virt_addr);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (unmap)
|
|
iounmap(virt_addr);
|
|
else
|
|
rcu_read_unlock();
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void acpi_os_execute_deferred(struct work_struct *work)
|
|
{
|
|
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
|
|
|
|
dpc->function(dpc->context);
|
|
kfree(dpc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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_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));
|
|
|
|
/*
|
|
* Allocate/initialize DPC structure. Note that this memory will be
|
|
* 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
|
|
* 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.
|
|
*/
|
|
if (type == OSL_NOTIFY_HANDLER) {
|
|
queue = kacpi_notify_wq;
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
} else {
|
|
queue = kacpid_wq;
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
kfree(dpc);
|
|
}
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_execute);
|
|
|
|
void acpi_os_wait_events_complete(void)
|
|
{
|
|
/*
|
|
* Make sure the GPE handler or the fixed event handler is not used
|
|
* on another CPU after removal.
|
|
*/
|
|
if (acpi_irq_handler)
|
|
synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
|
|
flush_workqueue(kacpid_wq);
|
|
flush_workqueue(kacpi_notify_wq);
|
|
}
|
|
|
|
struct acpi_hp_work {
|
|
struct work_struct work;
|
|
struct acpi_device *adev;
|
|
u32 src;
|
|
};
|
|
|
|
static void acpi_hotplug_work_fn(struct work_struct *work)
|
|
{
|
|
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);
|
|
kfree(hpw);
|
|
}
|
|
|
|
acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
|
|
{
|
|
struct acpi_hp_work *hpw;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Scheduling hotplug event (%p, %u) for deferred execution.\n",
|
|
adev, src));
|
|
|
|
hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
|
|
if (!hpw)
|
|
return AE_NO_MEMORY;
|
|
|
|
INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
|
|
hpw->adev = adev;
|
|
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 (!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 (!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;
|
|
}
|
|
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
u32 acpi_os_get_line(char *buffer)
|
|
{
|
|
|
|
#ifdef ENABLE_DEBUGGER
|
|
if (acpi_in_debugger) {
|
|
u32 chars;
|
|
|
|
kdb_read(buffer, sizeof(line_buf));
|
|
|
|
/* remove the CR kdb includes */
|
|
chars = strlen(buffer) - 1;
|
|
buffer[chars] = '\0';
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
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);
|
|
|
|
#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
|
|
#define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
|
|
|
|
struct osi_setup_entry {
|
|
char string[OSI_STRING_LENGTH_MAX];
|
|
bool enable;
|
|
};
|
|
|
|
static struct osi_setup_entry
|
|
osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
|
|
{"Module Device", true},
|
|
{"Processor Device", true},
|
|
{"3.0 _SCP Extensions", true},
|
|
{"Processor Aggregator Device", true},
|
|
};
|
|
|
|
void __init acpi_osi_setup(char *str)
|
|
{
|
|
struct osi_setup_entry *osi;
|
|
bool enable = true;
|
|
int i;
|
|
|
|
if (!acpi_gbl_create_osi_method)
|
|
return;
|
|
|
|
if (str == NULL || *str == '\0') {
|
|
printk(KERN_INFO PREFIX "_OSI method disabled\n");
|
|
acpi_gbl_create_osi_method = FALSE;
|
|
return;
|
|
}
|
|
|
|
if (*str == '!') {
|
|
str++;
|
|
if (*str == '\0') {
|
|
osi_linux.default_disabling = 1;
|
|
return;
|
|
} else if (*str == '*') {
|
|
acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
|
|
for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
|
|
osi = &osi_setup_entries[i];
|
|
osi->enable = false;
|
|
}
|
|
return;
|
|
}
|
|
enable = false;
|
|
}
|
|
|
|
for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
|
|
osi = &osi_setup_entries[i];
|
|
if (!strcmp(osi->string, str)) {
|
|
osi->enable = enable;
|
|
break;
|
|
} else if (osi->string[0] == '\0') {
|
|
osi->enable = enable;
|
|
strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init set_osi_linux(unsigned int enable)
|
|
{
|
|
if (osi_linux.enable != enable)
|
|
osi_linux.enable = enable;
|
|
|
|
if (osi_linux.enable)
|
|
acpi_osi_setup("Linux");
|
|
else
|
|
acpi_osi_setup("!Linux");
|
|
|
|
return;
|
|
}
|
|
|
|
static void __init acpi_cmdline_osi_linux(unsigned int enable)
|
|
{
|
|
osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
|
|
osi_linux.dmi = 0;
|
|
set_osi_linux(enable);
|
|
|
|
return;
|
|
}
|
|
|
|
void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
|
|
{
|
|
printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
|
|
|
|
if (enable == -1)
|
|
return;
|
|
|
|
osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
|
|
set_osi_linux(enable);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Modify the list of "OS Interfaces" reported to BIOS via _OSI
|
|
*
|
|
* empty string disables _OSI
|
|
* string starting with '!' disables that string
|
|
* otherwise string is added to list, augmenting built-in strings
|
|
*/
|
|
static void __init acpi_osi_setup_late(void)
|
|
{
|
|
struct osi_setup_entry *osi;
|
|
char *str;
|
|
int i;
|
|
acpi_status status;
|
|
|
|
if (osi_linux.default_disabling) {
|
|
status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
|
|
|
|
if (ACPI_SUCCESS(status))
|
|
printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
|
|
}
|
|
|
|
for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
|
|
osi = &osi_setup_entries[i];
|
|
str = osi->string;
|
|
|
|
if (*str == '\0')
|
|
break;
|
|
if (osi->enable) {
|
|
status = acpi_install_interface(str);
|
|
|
|
if (ACPI_SUCCESS(status))
|
|
printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
|
|
} else {
|
|
status = acpi_remove_interface(str);
|
|
|
|
if (ACPI_SUCCESS(status))
|
|
printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int __init osi_setup(char *str)
|
|
{
|
|
if (str && !strcmp("Linux", str))
|
|
acpi_cmdline_osi_linux(1);
|
|
else if (str && !strcmp("!Linux", str))
|
|
acpi_cmdline_osi_linux(0);
|
|
else
|
|
acpi_osi_setup(str);
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_osi=", osi_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);
|
|
|
|
/* 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)
|
|
* -> further driver trying to access the resources will not load
|
|
* - lax (1)
|
|
* -> 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;
|
|
|
|
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_adr_space_type space_id;
|
|
acpi_size length;
|
|
u8 warn = 0;
|
|
int clash = 0;
|
|
|
|
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;
|
|
|
|
length = resource_size(res);
|
|
if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
|
|
warn = 1;
|
|
clash = acpi_check_address_range(space_id, res->start, length, warn);
|
|
|
|
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");
|
|
}
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(acpi_check_resource_conflict);
|
|
|
|
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);
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* Acquire a spinlock.
|
|
*
|
|
* handle is a pointer to the spinlock_t.
|
|
*/
|
|
|
|
acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
|
|
{
|
|
acpi_cpu_flags flags;
|
|
spin_lock_irqsave(lockp, flags);
|
|
return flags;
|
|
}
|
|
|
|
/*
|
|
* Release a spinlock. See above.
|
|
*/
|
|
|
|
void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
|
|
{
|
|
spin_unlock_irqrestore(lockp, flags);
|
|
}
|
|
|
|
#ifndef ACPI_USE_LOCAL_CACHE
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_create_cache
|
|
*
|
|
* 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
|
|
*
|
|
* RETURN: status
|
|
*
|
|
* DESCRIPTION: Create a cache object
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
|
|
{
|
|
*cache = kmem_cache_create(name, size, 0, 0, NULL);
|
|
if (*cache == NULL)
|
|
return AE_ERROR;
|
|
else
|
|
return AE_OK;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
kmem_cache_shrink(cache);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
kmem_cache_destroy(cache);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
kmem_cache_free(cache, object);
|
|
return (AE_OK);
|
|
}
|
|
#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);
|
|
|
|
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);
|
|
}
|
|
|
|
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_install_interface_handler(acpi_osi_handler);
|
|
acpi_osi_setup_late();
|
|
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_SKIP;
|
|
|
|
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;
|
|
}
|
|
|
|
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_SKIP;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
|
|
u32 val_a, u32 val_b))
|
|
{
|
|
__acpi_os_prepare_extended_sleep = func;
|
|
}
|