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https://mirrors.bfsu.edu.cn/git/linux.git
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556f12f602
Host bridge hotplug - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu) - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu) - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu) - Stop caching _PRT and make independent of bus numbers (Yinghai Lu) PCI device hotplug - Clean up cpqphp dead code (Sasha Levin) - Disable ARI unless device and upstream bridge support it (Yijing Wang) - Initialize all hot-added devices (not functions 0-7) (Yijing Wang) Power management - Don't touch ASPM if disabled (Joe Lawrence) - Fix ASPM link state management (Myron Stowe) Miscellaneous - Fix PCI_EXP_FLAGS accessor (Alex Williamson) - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov) - Document hotplug resource and MPS parameters (Yijing Wang) - Add accessor for PCIe capabilities (Myron Stowe) - Drop pciehp suspend/resume messages (Paul Bolle) - Make pci_slot built-in only (not a module) (Jiang Liu) - Remove unused PCI/ACPI bind ops (Jiang Liu) - Removed used pci_root_bus (Bjorn Helgaas) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJRKS3hAAoJEFmIoMA60/r8xxoP/j1CS4oCZAnBIVT9fKBkis+/ CENcfHIUKj6J9iMfJEVvqBELvqaLqtpeNwAGMcGPxV7VuT3K1QumChfaTpRDP0HC VDRmrjcmfenEK+YPOG7acsrTyqk2wjpLOyu9MKRxtC5u7tF6376KQpkEFpO4haL4 eUHTxfE76OkrPBSvx3+PUSf6jqrvrNbjX8K6HdDVVlm3sVAQKmYJU/Wphv2NPOqa CAMyCzEGybFjr8hDRwvWgr+06c718GMwQUbnrPdHXAe7lMNMrN/XVBmU9ABN3Aas icd3lrDs+yPObgcO/gT8+sAZErCtdJ9zuHGYHdYpRbIQj/5JT4TMk7tw/Bj7vKY9 Mqmho9GR5YmYTRN9f1r+2n5AQ/KYWXJDrRNOnt5/ys5BOM3vwJ7WJ902zpSwtFQp nLX+oD/hLfzpnoIQGDuBAoAXp2Kam3XWRgVvG78buRNrPj+kUzimk14a8qQeY+CB El6UKuwi5Uv/qgs1gAqqjmZmsAkon2DnsRZa6Fl8NTkDlis7LY4gp9OU38ySFpB+ PhCmRyCZmDDqTVtwj6XzR3nPQ5LBSbvsTfgMxYMIUSXHa06tyb2q5p4mEIas0OmU RKaP5xQqZuTgD8fbdYrx0xgSrn7JHt/j/X//Qs6unlLCWhlpm3LjJZKxyw2FwBGr o4Lci+PiBh3MowCrju9D =ER3b -----END PGP SIGNATURE----- Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI changes from Bjorn Helgaas: "Host bridge hotplug - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu) - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu) - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu) - Stop caching _PRT and make independent of bus numbers (Yinghai Lu) PCI device hotplug - Clean up cpqphp dead code (Sasha Levin) - Disable ARI unless device and upstream bridge support it (Yijing Wang) - Initialize all hot-added devices (not functions 0-7) (Yijing Wang) Power management - Don't touch ASPM if disabled (Joe Lawrence) - Fix ASPM link state management (Myron Stowe) Miscellaneous - Fix PCI_EXP_FLAGS accessor (Alex Williamson) - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov) - Document hotplug resource and MPS parameters (Yijing Wang) - Add accessor for PCIe capabilities (Myron Stowe) - Drop pciehp suspend/resume messages (Paul Bolle) - Make pci_slot built-in only (not a module) (Jiang Liu) - Remove unused PCI/ACPI bind ops (Jiang Liu) - Removed used pci_root_bus (Bjorn Helgaas)" * tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits) PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS ACPI / PCI: Make pci_slot built-in only, not a module PCI/PM: Clear state_saved during suspend PCI: Use atomic_inc_return() rather than atomic_add_return() PCI: Catch attempts to disable already-disabled devices PCI: Disable Bus Master unconditionally in pci_device_shutdown() PCI: acpiphp: Remove dead code for PCI host bridge hotplug PCI: acpiphp: Create companion ACPI devices before creating PCI devices PCI: Remove unused "rc" in virtfn_add_bus() PCI: pciehp: Drop suspend/resume ENTRY messages PCI/ASPM: Don't touch ASPM if forcibly disabled PCI/ASPM: Deallocate upstream link state even if device is not PCIe PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc PCI: Document hpiosize= and hpmemsize= resource reservation parameters PCI: Use PCI Express Capability accessor PCI: Introduce accessor to retrieve PCIe Capabilities Register PCI: Put pci_dev in device tree as early as possible PCI: Skip attaching driver in device_add() PCI: acpiphp: Keep driver loaded even if no slots found ...
1801 lines
42 KiB
C
1801 lines
42 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/acpi_io.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 <acpi/acpi.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/processor.h>
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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#define PREFIX "ACPI: "
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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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int wait;
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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 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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} osi_linux = {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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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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acpi_rsdp = simple_strtoul(arg, NULL, 16);
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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 {
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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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}
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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_memory(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;
|
|
map->refcount = 1;
|
|
|
|
list_add_tail_rcu(&map->list, &acpi_ioremaps);
|
|
|
|
out:
|
|
mutex_unlock(&acpi_ioremap_lock);
|
|
return map->virt + (phys - map->phys);
|
|
}
|
|
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();
|
|
acpi_unmap(map->phys, map->virt);
|
|
kfree(map);
|
|
}
|
|
}
|
|
|
|
void __ref acpi_os_unmap_memory(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_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_memory(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() */
|
|
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 };
|
|
|
|
/* Non-fatal errors: Affected tables/files are ignored */
|
|
#define INVALID_TABLE(x, path, name) \
|
|
{ pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); continue; }
|
|
|
|
#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
|
|
|
|
/* Must not increase 10 or needs code modification below */
|
|
#define ACPI_OVERRIDE_TABLES 10
|
|
|
|
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;
|
|
struct cpio_data early_initrd_files[ACPI_OVERRIDE_TABLES];
|
|
char *p;
|
|
|
|
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))
|
|
INVALID_TABLE("Table smaller than ACPI header",
|
|
cpio_path, file.name);
|
|
|
|
table = file.data;
|
|
|
|
for (sig = 0; table_sigs[sig]; sig++)
|
|
if (!memcmp(table->signature, table_sigs[sig], 4))
|
|
break;
|
|
|
|
if (!table_sigs[sig])
|
|
INVALID_TABLE("Unknown signature",
|
|
cpio_path, file.name);
|
|
if (file.size != table->length)
|
|
INVALID_TABLE("File length does not match table length",
|
|
cpio_path, file.name);
|
|
if (acpi_table_checksum(file.data, table->length))
|
|
INVALID_TABLE("Bad table checksum",
|
|
cpio_path, file.name);
|
|
|
|
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;
|
|
early_initrd_files[table_nr].data = file.data;
|
|
early_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, acpi_tables_addr + all_tables_size);
|
|
arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
|
|
|
|
p = early_ioremap(acpi_tables_addr, all_tables_size);
|
|
|
|
for (no = 0; no < table_nr; no++) {
|
|
memcpy(p + total_offset, early_initrd_files[no].data,
|
|
early_initrd_files[no].size);
|
|
total_offset += early_initrd_files[no].size;
|
|
}
|
|
early_iounmap(p, all_tables_size);
|
|
}
|
|
#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 | IRQF_NO_SUSPEND, "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)
|
|
{
|
|
schedule_timeout_interruptible(msecs_to_jiffies(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)
|
|
{
|
|
static u64 t;
|
|
|
|
#ifdef CONFIG_HPET
|
|
/* TBD: use HPET if available */
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_PM_TIMER
|
|
/* TBD: default to PM timer if HPET was not available */
|
|
#endif
|
|
if (!t)
|
|
printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
|
|
|
|
return ++t;
|
|
}
|
|
|
|
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);
|
|
|
|
if (dpc->wait)
|
|
acpi_os_wait_events_complete();
|
|
|
|
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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status __acpi_os_execute(acpi_execute_type type,
|
|
acpi_osd_exec_callback function, void *context, int hp)
|
|
{
|
|
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;
|
|
|
|
/*
|
|
* We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
|
|
* because the hotplug code may call driver .remove() functions,
|
|
* which invoke flush_scheduled_work/acpi_os_wait_events_complete
|
|
* to flush these workqueues.
|
|
*
|
|
* 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 (hp) {
|
|
queue = kacpi_hotplug_wq;
|
|
dpc->wait = 1;
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
} else 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;
|
|
}
|
|
|
|
acpi_status acpi_os_execute(acpi_execute_type type,
|
|
acpi_osd_exec_callback function, void *context)
|
|
{
|
|
return __acpi_os_execute(type, function, context, 0);
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_execute);
|
|
|
|
acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
|
|
void *context)
|
|
{
|
|
return __acpi_os_execute(0, function, context, 1);
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_hotplug_execute);
|
|
|
|
void acpi_os_wait_events_complete(void)
|
|
{
|
|
flush_workqueue(kacpid_wq);
|
|
flush_workqueue(kacpi_notify_wq);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_wait_events_complete);
|
|
|
|
acpi_status
|
|
acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
|
|
{
|
|
struct semaphore *sem = NULL;
|
|
|
|
sem = acpi_os_allocate(sizeof(struct semaphore));
|
|
if (!sem)
|
|
return AE_NO_MEMORY;
|
|
memset(sem, 0, sizeof(struct semaphore));
|
|
|
|
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; 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 __initdata
|
|
osi_setup_entries[OSI_STRING_ENTRIES_MAX] = {
|
|
{"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++;
|
|
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;
|
|
|
|
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);
|
|
|
|
/* enable serialization to combat AE_ALREADY_EXISTS errors */
|
|
static int __init acpi_serialize_setup(char *str)
|
|
{
|
|
printk(KERN_INFO PREFIX "serialize enabled\n");
|
|
|
|
acpi_gbl_all_methods_serialized = TRUE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_serialize", acpi_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 = res->end - res->start + 1;
|
|
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
|
|
|
|
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);
|
|
|
|
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_workqueue("kacpi_hotplug", 0, 1);
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context,
|
|
void (*func)(struct work_struct *work))
|
|
{
|
|
struct acpi_hp_work *hp_work;
|
|
int ret;
|
|
|
|
hp_work = kmalloc(sizeof(*hp_work), GFP_KERNEL);
|
|
if (!hp_work)
|
|
return;
|
|
|
|
hp_work->handle = handle;
|
|
hp_work->type = type;
|
|
hp_work->context = context;
|
|
|
|
INIT_WORK(&hp_work->work, func);
|
|
ret = queue_work(kacpi_hotplug_wq, &hp_work->work);
|
|
if (!ret)
|
|
kfree(hp_work);
|
|
}
|
|
EXPORT_SYMBOL_GPL(alloc_acpi_hp_work);
|