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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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478c6a43fc
Conflicts: arch/x86/kernel/cpu/cpufreq/longhaul.c Signed-off-by: Len Brown <len.brown@intel.com>
1390 lines
33 KiB
C
1390 lines
33 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/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 <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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};
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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 unsigned int acpi_irq_irq;
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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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struct acpi_res_list {
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resource_size_t start;
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resource_size_t end;
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acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
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char name[5]; /* only can have a length of 4 chars, make use of this
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one instead of res->name, no need to kalloc then */
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struct list_head resource_list;
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};
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static LIST_HEAD(resource_list_head);
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static DEFINE_SPINLOCK(acpi_res_lock);
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#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
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static char osi_additional_string[OSI_STRING_LENGTH_MAX];
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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 known:1;
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} osi_linux = { 0, 0, 0, 0};
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static void __init acpi_request_region (struct acpi_generic_address *addr,
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unsigned int length, char *desc)
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{
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struct resource *res;
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if (!addr->address || !length)
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return;
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if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
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res = request_region(addr->address, length, desc);
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else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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res = request_mem_region(addr->address, 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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acpi_status __init acpi_os_initialize(void)
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{
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return AE_OK;
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}
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acpi_status acpi_os_initialize1(void)
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{
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kacpid_wq = create_singlethread_workqueue("kacpid");
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kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
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BUG_ON(!kacpid_wq);
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BUG_ON(!kacpi_notify_wq);
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return AE_OK;
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}
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acpi_status acpi_os_terminate(void)
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{
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if (acpi_irq_handler) {
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acpi_os_remove_interrupt_handler(acpi_irq_irq,
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acpi_irq_handler);
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}
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destroy_workqueue(kacpid_wq);
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destroy_workqueue(kacpi_notify_wq);
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return AE_OK;
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}
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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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acpi_physical_address __init acpi_os_get_root_pointer(void)
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{
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if (efi_enabled) {
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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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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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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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/*
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* ioremap checks to ensure this is in reserved space
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*/
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return ioremap((unsigned long)phys, size);
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else
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return __acpi_map_table((unsigned long)phys, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_memory);
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void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
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{
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if (acpi_gbl_permanent_mmap)
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iounmap(virt);
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else
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__acpi_unmap_table(virt, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
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void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
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{
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if (!acpi_gbl_permanent_mmap)
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__acpi_unmap_table(virt, size);
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}
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
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{
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if (!phys || !virt)
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return AE_BAD_PARAMETER;
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*phys = virt_to_phys(virt);
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return AE_OK;
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}
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#endif
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#define ACPI_MAX_OVERRIDE_LEN 100
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static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
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acpi_status
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acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
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acpi_string * new_val)
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{
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if (!init_val || !new_val)
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return AE_BAD_PARAMETER;
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*new_val = NULL;
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if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
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printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
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acpi_os_name);
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*new_val = acpi_os_name;
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}
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return AE_OK;
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}
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acpi_status
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acpi_os_table_override(struct acpi_table_header * existing_table,
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struct acpi_table_header ** new_table)
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{
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if (!existing_table || !new_table)
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return AE_BAD_PARAMETER;
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*new_table = NULL;
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#ifdef CONFIG_ACPI_CUSTOM_DSDT
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if (strncmp(existing_table->signature, "DSDT", 4) == 0)
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*new_table = (struct acpi_table_header *)AmlCode;
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#endif
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if (*new_table != NULL) {
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printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
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"this is unsafe: tainting kernel\n",
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existing_table->signature,
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existing_table->oem_table_id);
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add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
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}
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return AE_OK;
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}
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static irqreturn_t acpi_irq(int irq, void *dev_id)
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{
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u32 handled;
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handled = (*acpi_irq_handler) (acpi_irq_context);
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if (handled) {
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acpi_irq_handled++;
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return IRQ_HANDLED;
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} else
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return IRQ_NONE;
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}
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acpi_status
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acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
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void *context)
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{
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unsigned int irq;
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acpi_irq_stats_init();
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/*
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* Ignore the GSI from the core, and use the value in our copy of the
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* FADT. It may not be the same if an interrupt source override exists
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* for the SCI.
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*/
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gsi = acpi_gbl_FADT.sci_interrupt;
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if (acpi_gsi_to_irq(gsi, &irq) < 0) {
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printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
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gsi);
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return AE_OK;
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}
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acpi_irq_handler = handler;
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acpi_irq_context = context;
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if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
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printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
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return AE_NOT_ACQUIRED;
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}
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acpi_irq_irq = irq;
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return AE_OK;
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}
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acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
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{
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if (irq) {
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free_irq(irq, acpi_irq);
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acpi_irq_handler = NULL;
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acpi_irq_irq = 0;
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}
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return AE_OK;
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}
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/*
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* Running in interpreter thread context, safe to sleep
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*/
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void acpi_os_sleep(acpi_integer ms)
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{
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schedule_timeout_interruptible(msecs_to_jiffies(ms));
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}
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void acpi_os_stall(u32 us)
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{
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while (us) {
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u32 delay = 1000;
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if (delay > us)
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delay = us;
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udelay(delay);
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touch_nmi_watchdog();
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us -= delay;
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}
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}
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/*
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* Support ACPI 3.0 AML Timer operand
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* Returns 64-bit free-running, monotonically increasing timer
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* with 100ns granularity
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*/
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u64 acpi_os_get_timer(void)
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{
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static u64 t;
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#ifdef CONFIG_HPET
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/* TBD: use HPET if available */
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#endif
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#ifdef CONFIG_X86_PM_TIMER
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/* TBD: default to PM timer if HPET was not available */
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#endif
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if (!t)
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printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
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return ++t;
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}
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acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
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{
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u32 dummy;
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if (!value)
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value = &dummy;
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*value = 0;
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if (width <= 8) {
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*(u8 *) value = inb(port);
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} else if (width <= 16) {
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*(u16 *) value = inw(port);
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} else if (width <= 32) {
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*(u32 *) value = inl(port);
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} else {
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BUG();
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}
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return AE_OK;
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}
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EXPORT_SYMBOL(acpi_os_read_port);
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acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
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{
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if (width <= 8) {
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outb(value, port);
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} else if (width <= 16) {
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outw(value, port);
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} else if (width <= 32) {
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outl(value, port);
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} else {
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BUG();
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}
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return AE_OK;
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}
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EXPORT_SYMBOL(acpi_os_write_port);
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acpi_status
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acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
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{
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u32 dummy;
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void __iomem *virt_addr;
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virt_addr = ioremap(phys_addr, width);
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if (!value)
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value = &dummy;
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switch (width) {
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case 8:
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*(u8 *) value = readb(virt_addr);
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break;
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case 16:
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*(u16 *) value = readw(virt_addr);
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break;
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case 32:
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*(u32 *) value = readl(virt_addr);
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break;
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default:
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BUG();
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}
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iounmap(virt_addr);
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return AE_OK;
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}
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acpi_status
|
|
acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
|
|
{
|
|
void __iomem *virt_addr;
|
|
|
|
virt_addr = ioremap(phys_addr, width);
|
|
|
|
switch (width) {
|
|
case 8:
|
|
writeb(value, virt_addr);
|
|
break;
|
|
case 16:
|
|
writew(value, virt_addr);
|
|
break;
|
|
case 32:
|
|
writel(value, virt_addr);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
iounmap(virt_addr);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
|
|
u32 *value, u32 width)
|
|
{
|
|
int result, size;
|
|
|
|
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, value);
|
|
|
|
return (result ? AE_ERROR : AE_OK);
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
|
|
acpi_integer 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);
|
|
}
|
|
|
|
/* TODO: Change code to take advantage of driver model more */
|
|
static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */
|
|
acpi_handle chandle, /* current node */
|
|
struct acpi_pci_id **id,
|
|
int *is_bridge, u8 * bus_number)
|
|
{
|
|
acpi_handle handle;
|
|
struct acpi_pci_id *pci_id = *id;
|
|
acpi_status status;
|
|
unsigned long long temp;
|
|
acpi_object_type type;
|
|
|
|
acpi_get_parent(chandle, &handle);
|
|
if (handle != rhandle) {
|
|
acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
|
|
bus_number);
|
|
|
|
status = acpi_get_type(handle, &type);
|
|
if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
|
|
return;
|
|
|
|
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
|
|
&temp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
u32 val;
|
|
pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
|
|
pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
|
|
|
|
if (*is_bridge)
|
|
pci_id->bus = *bus_number;
|
|
|
|
/* any nicer way to get bus number of bridge ? */
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
|
|
8);
|
|
if (ACPI_SUCCESS(status)
|
|
&& ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x18,
|
|
&val, 8);
|
|
if (!ACPI_SUCCESS(status)) {
|
|
/* Certainly broken... FIX ME */
|
|
return;
|
|
}
|
|
*is_bridge = 1;
|
|
pci_id->bus = val;
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x19,
|
|
&val, 8);
|
|
if (ACPI_SUCCESS(status)) {
|
|
*bus_number = val;
|
|
}
|
|
} else
|
|
*is_bridge = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */
|
|
acpi_handle chandle, /* current node */
|
|
struct acpi_pci_id **id)
|
|
{
|
|
int is_bridge = 1;
|
|
u8 bus_number = (*id)->bus;
|
|
|
|
acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
|
|
}
|
|
|
|
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) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
dpc->function(dpc->context);
|
|
kfree(dpc);
|
|
|
|
return;
|
|
}
|
|
|
|
static void acpi_os_execute_hp_deferred(struct work_struct *work)
|
|
{
|
|
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
|
|
if (!dpc) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
acpi_os_wait_events_complete(NULL);
|
|
|
|
dpc->function(dpc->context);
|
|
kfree(dpc);
|
|
|
|
return;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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));
|
|
|
|
if (!function)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
/*
|
|
* 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 = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
|
|
if (!dpc)
|
|
return AE_NO_MEMORY;
|
|
|
|
dpc->function = function;
|
|
dpc->context = context;
|
|
|
|
if (!hp) {
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
queue = (type == OSL_NOTIFY_HANDLER) ?
|
|
kacpi_notify_wq : kacpid_wq;
|
|
ret = queue_work(queue, &dpc->work);
|
|
} else {
|
|
INIT_WORK(&dpc->work, acpi_os_execute_hp_deferred);
|
|
ret = schedule_work(&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);
|
|
}
|
|
|
|
void acpi_os_wait_events_complete(void *context)
|
|
{
|
|
flush_workqueue(kacpid_wq);
|
|
flush_workqueue(kacpi_notify_wq);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_wait_events_complete);
|
|
|
|
/*
|
|
* Allocate the memory for a spinlock and initialize it.
|
|
*/
|
|
acpi_status acpi_os_create_lock(acpi_spinlock * handle)
|
|
{
|
|
spin_lock_init(*handle);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* Deallocate the memory for a spinlock.
|
|
*/
|
|
void acpi_os_delete_lock(acpi_spinlock handle)
|
|
{
|
|
return;
|
|
}
|
|
|
|
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);
|
|
|
|
static void __init set_osi_linux(unsigned int enable)
|
|
{
|
|
if (osi_linux.enable != enable) {
|
|
osi_linux.enable = enable;
|
|
printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
|
|
enable ? "Add": "Delet");
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void __init acpi_cmdline_osi_linux(unsigned int enable)
|
|
{
|
|
osi_linux.cmdline = 1; /* cmdline set the default */
|
|
set_osi_linux(enable);
|
|
|
|
return;
|
|
}
|
|
|
|
void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
|
|
{
|
|
osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
|
|
|
|
printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
|
|
|
|
if (enable == -1)
|
|
return;
|
|
|
|
osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */
|
|
|
|
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
|
|
*/
|
|
int __init acpi_osi_setup(char *str)
|
|
{
|
|
if (str == NULL || *str == '\0') {
|
|
printk(KERN_INFO PREFIX "_OSI method disabled\n");
|
|
acpi_gbl_create_osi_method = FALSE;
|
|
} else if (!strcmp("!Linux", str)) {
|
|
acpi_cmdline_osi_linux(0); /* !enable */
|
|
} else if (*str == '!') {
|
|
if (acpi_osi_invalidate(++str) == AE_OK)
|
|
printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
|
|
} else if (!strcmp("Linux", str)) {
|
|
acpi_cmdline_osi_linux(1); /* enable */
|
|
} else if (*osi_additional_string == '\0') {
|
|
strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
|
|
printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_osi=", acpi_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);
|
|
|
|
/*
|
|
* Wake and Run-Time GPES are expected to be separate.
|
|
* We disable wake-GPEs at run-time to prevent spurious
|
|
* interrupts.
|
|
*
|
|
* However, if a system exists that shares Wake and
|
|
* Run-time events on the same GPE this flag is available
|
|
* to tell Linux to keep the wake-time GPEs enabled at run-time.
|
|
*/
|
|
static int __init acpi_wake_gpes_always_on_setup(char *str)
|
|
{
|
|
printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
|
|
|
|
acpi_gbl_leave_wake_gpes_disabled = FALSE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_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(struct resource *res)
|
|
{
|
|
struct acpi_res_list *res_list_elem;
|
|
int ioport;
|
|
int clash = 0;
|
|
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
|
|
return 0;
|
|
if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
|
|
return 0;
|
|
|
|
ioport = res->flags & IORESOURCE_IO;
|
|
|
|
spin_lock(&acpi_res_lock);
|
|
list_for_each_entry(res_list_elem, &resource_list_head,
|
|
resource_list) {
|
|
if (ioport && (res_list_elem->resource_type
|
|
!= ACPI_ADR_SPACE_SYSTEM_IO))
|
|
continue;
|
|
if (!ioport && (res_list_elem->resource_type
|
|
!= ACPI_ADR_SPACE_SYSTEM_MEMORY))
|
|
continue;
|
|
|
|
if (res->end < res_list_elem->start
|
|
|| res_list_elem->end < res->start)
|
|
continue;
|
|
clash = 1;
|
|
break;
|
|
}
|
|
spin_unlock(&acpi_res_lock);
|
|
|
|
if (clash) {
|
|
if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
|
|
printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
|
|
" conflicts with ACPI region %s"
|
|
" [0x%llx-0x%llx]\n",
|
|
acpi_enforce_resources == ENFORCE_RESOURCES_LAX
|
|
? KERN_WARNING : KERN_ERR,
|
|
ioport ? "I/O" : "Memory", res->name,
|
|
(long long) res->start, (long long) res->end,
|
|
res_list_elem->name,
|
|
(long long) res_list_elem->start,
|
|
(long long) res_list_elem->end);
|
|
printk(KERN_INFO "ACPI: Device needs an ACPI 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);
|
|
|
|
int acpi_check_mem_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_MEM,
|
|
};
|
|
|
|
return acpi_check_resource_conflict(&res);
|
|
|
|
}
|
|
EXPORT_SYMBOL(acpi_check_mem_region);
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_validate_interface
|
|
*
|
|
* PARAMETERS: interface - Requested interface to be validated
|
|
*
|
|
* RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
|
|
*
|
|
* DESCRIPTION: Match an interface string to the interfaces supported by the
|
|
* host. Strings originate from an AML call to the _OSI method.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_validate_interface (char *interface)
|
|
{
|
|
if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
|
|
return AE_OK;
|
|
if (!strcmp("Linux", interface)) {
|
|
|
|
printk(KERN_NOTICE PREFIX
|
|
"BIOS _OSI(Linux) query %s%s\n",
|
|
osi_linux.enable ? "honored" : "ignored",
|
|
osi_linux.cmdline ? " via cmdline" :
|
|
osi_linux.dmi ? " via DMI" : "");
|
|
|
|
if (osi_linux.enable)
|
|
return AE_OK;
|
|
}
|
|
return AE_SUPPORT;
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_validate_address
|
|
*
|
|
* PARAMETERS: space_id - ACPI space ID
|
|
* address - Physical address
|
|
* length - Address length
|
|
*
|
|
* RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
|
|
* should return AE_AML_ILLEGAL_ADDRESS.
|
|
*
|
|
* DESCRIPTION: Validate a system address via the host OS. Used to validate
|
|
* the addresses accessed by AML operation regions.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_validate_address (
|
|
u8 space_id,
|
|
acpi_physical_address address,
|
|
acpi_size length,
|
|
char *name)
|
|
{
|
|
struct acpi_res_list *res;
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
|
|
return AE_OK;
|
|
|
|
switch (space_id) {
|
|
case ACPI_ADR_SPACE_SYSTEM_IO:
|
|
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
|
|
/* Only interference checks against SystemIO and SytemMemory
|
|
are needed */
|
|
res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
|
|
if (!res)
|
|
return AE_OK;
|
|
/* ACPI names are fixed to 4 bytes, still better use strlcpy */
|
|
strlcpy(res->name, name, 5);
|
|
res->start = address;
|
|
res->end = address + length - 1;
|
|
res->resource_type = space_id;
|
|
spin_lock(&acpi_res_lock);
|
|
list_add(&res->resource_list, &resource_list_head);
|
|
spin_unlock(&acpi_res_lock);
|
|
pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
|
|
"name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
|
|
? "SystemIO" : "System Memory",
|
|
(unsigned long long)res->start,
|
|
(unsigned long long)res->end,
|
|
res->name);
|
|
break;
|
|
case ACPI_ADR_SPACE_PCI_CONFIG:
|
|
case ACPI_ADR_SPACE_EC:
|
|
case ACPI_ADR_SPACE_SMBUS:
|
|
case ACPI_ADR_SPACE_CMOS:
|
|
case ACPI_ADR_SPACE_PCI_BAR_TARGET:
|
|
case ACPI_ADR_SPACE_DATA_TABLE:
|
|
case ACPI_ADR_SPACE_FIXED_HARDWARE:
|
|
break;
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
#endif
|