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12064c1768
This reverts commit437b38c511
. The memory semantics added in commit437b38c511
causes SystemMemory Operation region, whose address range is not described in the EFI memory map to be mapped as NormalNC memory on arm64 platforms (through acpi_os_map_memory() in acpi_ex_system_memory_space_handler()). This triggers the following abort on an ARM64 Ampere eMAG machine, because presumably the physical address range area backing the Opregion does not support NormalNC memory attributes driven on the bus. Internal error: synchronous external abort: 96000410 [#1] SMP Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.14.0+ #462 Hardware name: MiTAC RAPTOR EV-883832-X3-0001/RAPTOR, BIOS 0.14 02/22/2019 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [...snip...] Call trace: acpi_ex_system_memory_space_handler+0x26c/0x2c8 acpi_ev_address_space_dispatch+0x228/0x2c4 acpi_ex_access_region+0x114/0x268 acpi_ex_field_datum_io+0x128/0x1b8 acpi_ex_extract_from_field+0x14c/0x2ac acpi_ex_read_data_from_field+0x190/0x1b8 acpi_ex_resolve_node_to_value+0x1ec/0x288 acpi_ex_resolve_to_value+0x250/0x274 acpi_ds_evaluate_name_path+0xac/0x124 acpi_ds_exec_end_op+0x90/0x410 acpi_ps_parse_loop+0x4ac/0x5d8 acpi_ps_parse_aml+0xe0/0x2c8 acpi_ps_execute_method+0x19c/0x1ac acpi_ns_evaluate+0x1f8/0x26c acpi_ns_init_one_device+0x104/0x140 acpi_ns_walk_namespace+0x158/0x1d0 acpi_ns_initialize_devices+0x194/0x218 acpi_initialize_objects+0x48/0x50 acpi_init+0xe0/0x498 If the Opregion address range is not present in the EFI memory map there is no way for us to determine the memory attributes to use to map it - defaulting to NormalNC does not work (and it is not correct on a memory region that may have read side-effects) and therefore commit437b38c511
should be reverted, which means reverting back to the original behavior whereby address ranges that are mapped using acpi_os_map_memory() default to the safe devicenGnRnE attributes on ARM64 if the mapped address range is not defined in the EFI memory map. Fixes:437b38c511
("ACPI: Add memory semantics to acpi_os_map_memory()") Signed-off-by: Jia He <justin.he@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1854 lines
43 KiB
C
1854 lines
43 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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#define pr_fmt(fmt) "ACPI: OSL: " fmt
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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/lockdep.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 <linux/security.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <linux/io-64-nonatomic-lo-hi.h>
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#include "acpica/accommon.h"
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#include "acpica/acnamesp.h"
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#include "internal.h"
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/* Definitions for ACPI_DEBUG_PRINT() */
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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struct acpi_os_dpc {
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acpi_osd_exec_callback function;
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void *context;
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struct work_struct work;
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};
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#ifdef 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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#endif /*ENABLE_DEBUGGER */
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static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
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u32 pm1b_ctrl);
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static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
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u32 val_b);
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static acpi_osd_handler acpi_irq_handler;
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static void *acpi_irq_context;
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static struct workqueue_struct *kacpid_wq;
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static struct workqueue_struct *kacpi_notify_wq;
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static struct workqueue_struct *kacpi_hotplug_wq;
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static bool acpi_os_initialized;
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unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
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bool acpi_permanent_mmap = false;
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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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union {
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unsigned long refcount;
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struct rcu_work rwork;
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} track;
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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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#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map)
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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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fs_initcall_sync(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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EXPORT_SYMBOL(acpi_os_printf);
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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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if (printk_get_level(buffer))
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printk("%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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if (acpi_debugger_write_log(buffer) < 0) {
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if (printk_get_level(buffer))
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printk("%s", buffer);
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else
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printk(KERN_CONT "%s", buffer);
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}
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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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return kstrtoul(arg, 16, &acpi_rsdp);
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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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acpi_physical_address pa;
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#ifdef CONFIG_KEXEC
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/*
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* We may have been provided with an RSDP on the command line,
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* but if a malicious user has done so they may be pointing us
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* at modified ACPI tables that could alter kernel behaviour -
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* so, we check the lockdown status before making use of
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* it. If we trust it then also stash it in an architecture
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* specific location (if appropriate) so it can be carried
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* over further kexec()s.
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*/
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if (acpi_rsdp && !security_locked_down(LOCKDOWN_ACPI_TABLES)) {
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acpi_arch_set_root_pointer(acpi_rsdp);
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return acpi_rsdp;
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}
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#endif
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pa = acpi_arch_get_root_pointer();
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if (pa)
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return pa;
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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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if (efi.acpi != EFI_INVALID_TABLE_ADDR)
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return efi.acpi;
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pr_err("System description tables not found\n");
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} else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
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acpi_find_root_pointer(&pa);
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}
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return pa;
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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, acpi_ioremap_lock_held())
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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->track.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, acpi_ioremap_lock_held())
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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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#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
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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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#else
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#define should_use_kmap(pfn) page_is_ram(pfn)
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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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/**
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* acpi_os_map_iomem - Get a virtual address for a given physical address range.
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* @phys: Start of the physical address range to map.
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* @size: Size of the physical address range to map.
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*
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* Look up the given physical address range in the list of existing ACPI memory
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* mappings. If found, get a reference to it and return a pointer to it (its
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* virtual address). If not found, map it, add it to that list and return a
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* pointer to it.
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*
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* During early init (when acpi_permanent_mmap has not been set yet) this
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* routine simply calls __acpi_map_table() to get the job done.
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*/
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void __iomem __ref
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*acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt;
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acpi_physical_address pg_off;
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acpi_size pg_sz;
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if (phys > ULONG_MAX) {
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pr_err("Cannot map memory that high: 0x%llx\n", phys);
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return NULL;
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}
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if (!acpi_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->track.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(phys, size);
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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 = (void __iomem __force *)((unsigned long)virt & PAGE_MASK);
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map->phys = pg_off;
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map->size = pg_sz;
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map->track.refcount = 1;
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list_add_tail_rcu(&map->list, &acpi_ioremaps);
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out:
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mutex_unlock(&acpi_ioremap_lock);
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return map->virt + (phys - map->phys);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
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void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
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{
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return (void *)acpi_os_map_iomem(phys, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_memory);
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static void acpi_os_map_remove(struct work_struct *work)
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{
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struct acpi_ioremap *map = container_of(to_rcu_work(work),
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struct acpi_ioremap,
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track.rwork);
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acpi_unmap(map->phys, map->virt);
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kfree(map);
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}
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/* Must be called with mutex_lock(&acpi_ioremap_lock) */
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static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
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{
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if (--map->track.refcount)
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return;
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list_del_rcu(&map->list);
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INIT_RCU_WORK(&map->track.rwork, acpi_os_map_remove);
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queue_rcu_work(system_wq, &map->track.rwork);
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}
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/**
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* acpi_os_unmap_iomem - Drop a memory mapping reference.
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* @virt: Start of the address range to drop a reference to.
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* @size: Size of the address range to drop a reference to.
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*
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* Look up the given virtual address range in the list of existing ACPI memory
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* mappings, drop a reference to it and if there are no more active references
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* to it, queue it up for later removal.
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*
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* During early init (when acpi_permanent_mmap has not been set yet) this
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* routine simply calls __acpi_unmap_table() to get the job done. Since
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* __acpi_unmap_table() is an __init function, the __ref annotation is needed
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* here.
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*/
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void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
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{
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struct acpi_ioremap *map;
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if (!acpi_permanent_mmap) {
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__acpi_unmap_table(virt, size);
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return;
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}
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup_virt(virt, size);
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if (!map) {
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mutex_unlock(&acpi_ioremap_lock);
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WARN(true, "ACPI: %s: bad address %p\n", __func__, virt);
|
|
return;
|
|
}
|
|
acpi_os_drop_map_ref(map);
|
|
|
|
mutex_unlock(&acpi_ioremap_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
|
|
|
|
/**
|
|
* acpi_os_unmap_memory - Drop a memory mapping reference.
|
|
* @virt: Start of the address range to drop a reference to.
|
|
* @size: Size of the address range to drop a reference to.
|
|
*/
|
|
void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
|
|
{
|
|
acpi_os_unmap_iomem((void __iomem *)virt, size);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
|
|
|
|
void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *gas)
|
|
{
|
|
u64 addr;
|
|
|
|
if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
|
|
return NULL;
|
|
|
|
/* Handle possible alignment issues */
|
|
memcpy(&addr, &gas->address, sizeof(addr));
|
|
if (!addr || !gas->bit_width)
|
|
return NULL;
|
|
|
|
return acpi_os_map_iomem(addr, gas->bit_width / 8);
|
|
}
|
|
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);
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_unmap_generic_address);
|
|
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
acpi_status
|
|
acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
|
|
{
|
|
if (!phys || !virt)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
*phys = virt_to_phys(virt);
|
|
|
|
return AE_OK;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
|
|
static bool acpi_rev_override;
|
|
|
|
int __init acpi_rev_override_setup(char *str)
|
|
{
|
|
acpi_rev_override = true;
|
|
return 1;
|
|
}
|
|
__setup("acpi_rev_override", acpi_rev_override_setup);
|
|
#else
|
|
#define acpi_rev_override false
|
|
#endif
|
|
|
|
#define ACPI_MAX_OVERRIDE_LEN 100
|
|
|
|
static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
|
|
|
|
acpi_status
|
|
acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
|
|
acpi_string *new_val)
|
|
{
|
|
if (!init_val || !new_val)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
*new_val = NULL;
|
|
if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
|
|
pr_info("Overriding _OS definition to '%s'\n", acpi_os_name);
|
|
*new_val = acpi_os_name;
|
|
}
|
|
|
|
if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
|
|
pr_info("Overriding _REV return value to 5\n");
|
|
*new_val = (char *)5;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
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) {
|
|
pr_err("SCI (ACPI GSI %d) not registered\n", gsi);
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_irq_handler = handler;
|
|
acpi_irq_context = context;
|
|
if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
|
|
pr_err("SCI (IRQ%d) allocation failed\n", irq);
|
|
acpi_irq_handler = NULL;
|
|
return AE_NOT_ACQUIRED;
|
|
}
|
|
acpi_sci_irq = irq;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
|
|
{
|
|
if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
|
|
return AE_BAD_PARAMETER;
|
|
|
|
free_irq(acpi_sci_irq, acpi_irq);
|
|
acpi_irq_handler = NULL;
|
|
acpi_sci_irq = INVALID_ACPI_IRQ;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* Running in interpreter thread context, safe to sleep
|
|
*/
|
|
|
|
void acpi_os_sleep(u64 ms)
|
|
{
|
|
msleep(ms);
|
|
}
|
|
|
|
void acpi_os_stall(u32 us)
|
|
{
|
|
while (us) {
|
|
u32 delay = 1000;
|
|
|
|
if (delay > us)
|
|
delay = us;
|
|
udelay(delay);
|
|
touch_nmi_watchdog();
|
|
us -= delay;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Support ACPI 3.0 AML Timer operand. Returns a 64-bit free-running,
|
|
* monotonically increasing timer with 100ns granularity. Do not use
|
|
* ktime_get() to implement this function because this function may get
|
|
* called after timekeeping has been suspended. Note: calling this function
|
|
* after timekeeping has been suspended may lead to unexpected results
|
|
* because when timekeeping is suspended the jiffies counter is not
|
|
* incremented. See also timekeeping_suspend().
|
|
*/
|
|
u64 acpi_os_get_timer(void)
|
|
{
|
|
return (get_jiffies_64() - INITIAL_JIFFIES) *
|
|
(ACPI_100NSEC_PER_SEC / HZ);
|
|
}
|
|
|
|
acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
|
|
{
|
|
u32 dummy;
|
|
|
|
if (!value)
|
|
value = &dummy;
|
|
|
|
*value = 0;
|
|
if (width <= 8) {
|
|
*(u8 *) value = inb(port);
|
|
} else if (width <= 16) {
|
|
*(u16 *) value = inw(port);
|
|
} else if (width <= 32) {
|
|
*(u32 *) value = inl(port);
|
|
} else {
|
|
BUG();
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_read_port);
|
|
|
|
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
|
|
{
|
|
if (width <= 8) {
|
|
outb(value, port);
|
|
} else if (width <= 16) {
|
|
outw(value, port);
|
|
} else if (width <= 32) {
|
|
outl(value, port);
|
|
} else {
|
|
BUG();
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_write_port);
|
|
|
|
int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width)
|
|
{
|
|
|
|
switch (width) {
|
|
case 8:
|
|
*(u8 *) value = readb(virt_addr);
|
|
break;
|
|
case 16:
|
|
*(u16 *) value = readw(virt_addr);
|
|
break;
|
|
case 32:
|
|
*(u32 *) value = readl(virt_addr);
|
|
break;
|
|
case 64:
|
|
*(u64 *) value = readq(virt_addr);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
|
|
{
|
|
void __iomem *virt_addr;
|
|
unsigned int size = width / 8;
|
|
bool unmap = false;
|
|
u64 dummy;
|
|
int error;
|
|
|
|
rcu_read_lock();
|
|
virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
|
|
if (!virt_addr) {
|
|
rcu_read_unlock();
|
|
virt_addr = acpi_os_ioremap(phys_addr, size);
|
|
if (!virt_addr)
|
|
return AE_BAD_ADDRESS;
|
|
unmap = true;
|
|
}
|
|
|
|
if (!value)
|
|
value = &dummy;
|
|
|
|
error = acpi_os_read_iomem(virt_addr, value, width);
|
|
BUG_ON(error);
|
|
|
|
if (unmap)
|
|
iounmap(virt_addr);
|
|
else
|
|
rcu_read_unlock();
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
|
|
{
|
|
void __iomem *virt_addr;
|
|
unsigned int size = width / 8;
|
|
bool unmap = false;
|
|
|
|
rcu_read_lock();
|
|
virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
|
|
if (!virt_addr) {
|
|
rcu_read_unlock();
|
|
virt_addr = acpi_os_ioremap(phys_addr, size);
|
|
if (!virt_addr)
|
|
return AE_BAD_ADDRESS;
|
|
unmap = true;
|
|
}
|
|
|
|
switch (width) {
|
|
case 8:
|
|
writeb(value, virt_addr);
|
|
break;
|
|
case 16:
|
|
writew(value, virt_addr);
|
|
break;
|
|
case 32:
|
|
writel(value, virt_addr);
|
|
break;
|
|
case 64:
|
|
writeq(value, virt_addr);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (unmap)
|
|
iounmap(virt_addr);
|
|
else
|
|
rcu_read_unlock();
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
acpi_status
|
|
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
|
|
u64 *value, u32 width)
|
|
{
|
|
int result, size;
|
|
u32 value32;
|
|
|
|
if (!value)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
switch (width) {
|
|
case 8:
|
|
size = 1;
|
|
break;
|
|
case 16:
|
|
size = 2;
|
|
break;
|
|
case 32:
|
|
size = 4;
|
|
break;
|
|
default:
|
|
return AE_ERROR;
|
|
}
|
|
|
|
result = raw_pci_read(pci_id->segment, pci_id->bus,
|
|
PCI_DEVFN(pci_id->device, pci_id->function),
|
|
reg, size, &value32);
|
|
*value = value32;
|
|
|
|
return (result ? AE_ERROR : AE_OK);
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
|
|
u64 value, u32 width)
|
|
{
|
|
int result, size;
|
|
|
|
switch (width) {
|
|
case 8:
|
|
size = 1;
|
|
break;
|
|
case 16:
|
|
size = 2;
|
|
break;
|
|
case 32:
|
|
size = 4;
|
|
break;
|
|
default:
|
|
return AE_ERROR;
|
|
}
|
|
|
|
result = raw_pci_write(pci_id->segment, pci_id->bus,
|
|
PCI_DEVFN(pci_id->device, pci_id->function),
|
|
reg, size, value);
|
|
|
|
return (result ? AE_ERROR : AE_OK);
|
|
}
|
|
#endif
|
|
|
|
static void acpi_os_execute_deferred(struct work_struct *work)
|
|
{
|
|
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
|
|
|
|
dpc->function(dpc->context);
|
|
kfree(dpc);
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_DEBUGGER
|
|
static struct acpi_debugger acpi_debugger;
|
|
static bool acpi_debugger_initialized;
|
|
|
|
int acpi_register_debugger(struct module *owner,
|
|
const struct acpi_debugger_ops *ops)
|
|
{
|
|
int ret = 0;
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (acpi_debugger.ops) {
|
|
ret = -EBUSY;
|
|
goto err_lock;
|
|
}
|
|
|
|
acpi_debugger.owner = owner;
|
|
acpi_debugger.ops = ops;
|
|
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(acpi_register_debugger);
|
|
|
|
void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
|
|
{
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (ops == acpi_debugger.ops) {
|
|
acpi_debugger.ops = NULL;
|
|
acpi_debugger.owner = NULL;
|
|
}
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
}
|
|
EXPORT_SYMBOL(acpi_unregister_debugger);
|
|
|
|
int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
|
|
{
|
|
int ret;
|
|
int (*func)(acpi_osd_exec_callback, void *);
|
|
struct module *owner;
|
|
|
|
if (!acpi_debugger_initialized)
|
|
return -ENODEV;
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (!acpi_debugger.ops) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
if (!try_module_get(acpi_debugger.owner)) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
func = acpi_debugger.ops->create_thread;
|
|
owner = acpi_debugger.owner;
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
|
|
ret = func(function, context);
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
module_put(owner);
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
|
|
ssize_t acpi_debugger_write_log(const char *msg)
|
|
{
|
|
ssize_t ret;
|
|
ssize_t (*func)(const char *);
|
|
struct module *owner;
|
|
|
|
if (!acpi_debugger_initialized)
|
|
return -ENODEV;
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (!acpi_debugger.ops) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
if (!try_module_get(acpi_debugger.owner)) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
func = acpi_debugger.ops->write_log;
|
|
owner = acpi_debugger.owner;
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
|
|
ret = func(msg);
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
module_put(owner);
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
|
|
ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
|
|
{
|
|
ssize_t ret;
|
|
ssize_t (*func)(char *, size_t);
|
|
struct module *owner;
|
|
|
|
if (!acpi_debugger_initialized)
|
|
return -ENODEV;
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (!acpi_debugger.ops) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
if (!try_module_get(acpi_debugger.owner)) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
func = acpi_debugger.ops->read_cmd;
|
|
owner = acpi_debugger.owner;
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
|
|
ret = func(buffer, buffer_length);
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
module_put(owner);
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
|
|
int acpi_debugger_wait_command_ready(void)
|
|
{
|
|
int ret;
|
|
int (*func)(bool, char *, size_t);
|
|
struct module *owner;
|
|
|
|
if (!acpi_debugger_initialized)
|
|
return -ENODEV;
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (!acpi_debugger.ops) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
if (!try_module_get(acpi_debugger.owner)) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
func = acpi_debugger.ops->wait_command_ready;
|
|
owner = acpi_debugger.owner;
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
|
|
ret = func(acpi_gbl_method_executing,
|
|
acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
module_put(owner);
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
|
|
int acpi_debugger_notify_command_complete(void)
|
|
{
|
|
int ret;
|
|
int (*func)(void);
|
|
struct module *owner;
|
|
|
|
if (!acpi_debugger_initialized)
|
|
return -ENODEV;
|
|
mutex_lock(&acpi_debugger.lock);
|
|
if (!acpi_debugger.ops) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
if (!try_module_get(acpi_debugger.owner)) {
|
|
ret = -ENODEV;
|
|
goto err_lock;
|
|
}
|
|
func = acpi_debugger.ops->notify_command_complete;
|
|
owner = acpi_debugger.owner;
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
|
|
ret = func();
|
|
|
|
mutex_lock(&acpi_debugger.lock);
|
|
module_put(owner);
|
|
err_lock:
|
|
mutex_unlock(&acpi_debugger.lock);
|
|
return ret;
|
|
}
|
|
|
|
int __init acpi_debugger_init(void)
|
|
{
|
|
mutex_init(&acpi_debugger.lock);
|
|
acpi_debugger_initialized = true;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_execute
|
|
*
|
|
* PARAMETERS: Type - Type of the callback
|
|
* Function - Function to be executed
|
|
* Context - Function parameters
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Depending on type, either queues function for deferred execution or
|
|
* immediately executes function on a separate thread.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_os_execute(acpi_execute_type type,
|
|
acpi_osd_exec_callback function, void *context)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_os_dpc *dpc;
|
|
struct workqueue_struct *queue;
|
|
int ret;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Scheduling function [%p(%p)] for deferred execution.\n",
|
|
function, context));
|
|
|
|
if (type == OSL_DEBUGGER_MAIN_THREAD) {
|
|
ret = acpi_debugger_create_thread(function, context);
|
|
if (ret) {
|
|
pr_err("Kernel thread creation failed\n");
|
|
status = AE_ERROR;
|
|
}
|
|
goto out_thread;
|
|
}
|
|
|
|
/*
|
|
* Allocate/initialize DPC structure. Note that this memory will be
|
|
* freed by the callee. The kernel handles the work_struct list in a
|
|
* way that allows us to also free its memory inside the callee.
|
|
* Because we may want to schedule several tasks with different
|
|
* parameters we can't use the approach some kernel code uses of
|
|
* having a static work_struct.
|
|
*/
|
|
|
|
dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
|
|
if (!dpc)
|
|
return AE_NO_MEMORY;
|
|
|
|
dpc->function = function;
|
|
dpc->context = context;
|
|
|
|
/*
|
|
* To prevent lockdep from complaining unnecessarily, make sure that
|
|
* there is a different static lockdep key for each workqueue by using
|
|
* INIT_WORK() for each of them separately.
|
|
*/
|
|
if (type == OSL_NOTIFY_HANDLER) {
|
|
queue = kacpi_notify_wq;
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
} else if (type == OSL_GPE_HANDLER) {
|
|
queue = kacpid_wq;
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
} else {
|
|
pr_err("Unsupported os_execute type %d.\n", type);
|
|
status = AE_ERROR;
|
|
}
|
|
|
|
if (ACPI_FAILURE(status))
|
|
goto err_workqueue;
|
|
|
|
/*
|
|
* On some machines, a software-initiated SMI causes corruption unless
|
|
* the SMI runs on CPU 0. An SMI can be initiated by any AML, but
|
|
* typically it's done in GPE-related methods that are run via
|
|
* workqueues, so we can avoid the known corruption cases by always
|
|
* queueing on CPU 0.
|
|
*/
|
|
ret = queue_work_on(0, queue, &dpc->work);
|
|
if (!ret) {
|
|
pr_err("Unable to queue work\n");
|
|
status = AE_ERROR;
|
|
}
|
|
err_workqueue:
|
|
if (ACPI_FAILURE(status))
|
|
kfree(dpc);
|
|
out_thread:
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_execute);
|
|
|
|
void acpi_os_wait_events_complete(void)
|
|
{
|
|
/*
|
|
* Make sure the GPE handler or the fixed event handler is not used
|
|
* on another CPU after removal.
|
|
*/
|
|
if (acpi_sci_irq_valid())
|
|
synchronize_hardirq(acpi_sci_irq);
|
|
flush_workqueue(kacpid_wq);
|
|
flush_workqueue(kacpi_notify_wq);
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_wait_events_complete);
|
|
|
|
struct acpi_hp_work {
|
|
struct work_struct work;
|
|
struct acpi_device *adev;
|
|
u32 src;
|
|
};
|
|
|
|
static void acpi_hotplug_work_fn(struct work_struct *work)
|
|
{
|
|
struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
|
|
|
|
acpi_os_wait_events_complete();
|
|
acpi_device_hotplug(hpw->adev, hpw->src);
|
|
kfree(hpw);
|
|
}
|
|
|
|
acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
|
|
{
|
|
struct acpi_hp_work *hpw;
|
|
|
|
acpi_handle_debug(adev->handle,
|
|
"Scheduling hotplug event %u for deferred handling\n",
|
|
src);
|
|
|
|
hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
|
|
if (!hpw)
|
|
return AE_NO_MEMORY;
|
|
|
|
INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
|
|
hpw->adev = adev;
|
|
hpw->src = src;
|
|
/*
|
|
* We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
|
|
* the hotplug code may call driver .remove() functions, which may
|
|
* invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
|
|
* these workqueues.
|
|
*/
|
|
if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
|
|
kfree(hpw);
|
|
return AE_ERROR;
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
bool acpi_queue_hotplug_work(struct work_struct *work)
|
|
{
|
|
return queue_work(kacpi_hotplug_wq, work);
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
|
|
{
|
|
struct semaphore *sem = NULL;
|
|
|
|
sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
|
|
if (!sem)
|
|
return AE_NO_MEMORY;
|
|
|
|
sema_init(sem, initial_units);
|
|
|
|
*handle = (acpi_handle *) sem;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
|
|
*handle, initial_units));
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* TODO: A better way to delete semaphores? Linux doesn't have a
|
|
* 'delete_semaphore()' function -- may result in an invalid
|
|
* pointer dereference for non-synchronized consumers. Should
|
|
* we at least check for blocked threads and signal/cancel them?
|
|
*/
|
|
|
|
acpi_status acpi_os_delete_semaphore(acpi_handle handle)
|
|
{
|
|
struct semaphore *sem = (struct semaphore *)handle;
|
|
|
|
if (!sem)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
|
|
|
|
BUG_ON(!list_empty(&sem->wait_list));
|
|
kfree(sem);
|
|
sem = NULL;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* TODO: Support for units > 1?
|
|
*/
|
|
acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct semaphore *sem = (struct semaphore *)handle;
|
|
long jiffies;
|
|
int ret = 0;
|
|
|
|
if (!acpi_os_initialized)
|
|
return AE_OK;
|
|
|
|
if (!sem || (units < 1))
|
|
return AE_BAD_PARAMETER;
|
|
|
|
if (units > 1)
|
|
return AE_SUPPORT;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
|
|
handle, units, timeout));
|
|
|
|
if (timeout == ACPI_WAIT_FOREVER)
|
|
jiffies = MAX_SCHEDULE_TIMEOUT;
|
|
else
|
|
jiffies = msecs_to_jiffies(timeout);
|
|
|
|
ret = down_timeout(sem, jiffies);
|
|
if (ret)
|
|
status = AE_TIME;
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
|
|
"Failed to acquire semaphore[%p|%d|%d], %s",
|
|
handle, units, timeout,
|
|
acpi_format_exception(status)));
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
|
|
"Acquired semaphore[%p|%d|%d]", handle,
|
|
units, timeout));
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* TODO: Support for units > 1?
|
|
*/
|
|
acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
|
|
{
|
|
struct semaphore *sem = (struct semaphore *)handle;
|
|
|
|
if (!acpi_os_initialized)
|
|
return AE_OK;
|
|
|
|
if (!sem || (units < 1))
|
|
return AE_BAD_PARAMETER;
|
|
|
|
if (units > 1)
|
|
return AE_SUPPORT;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
|
|
units));
|
|
|
|
up(sem);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
|
|
{
|
|
#ifdef ENABLE_DEBUGGER
|
|
if (acpi_in_debugger) {
|
|
u32 chars;
|
|
|
|
kdb_read(buffer, buffer_length);
|
|
|
|
/* remove the CR kdb includes */
|
|
chars = strlen(buffer) - 1;
|
|
buffer[chars] = '\0';
|
|
}
|
|
#else
|
|
int ret;
|
|
|
|
ret = acpi_debugger_read_cmd(buffer, buffer_length);
|
|
if (ret < 0)
|
|
return AE_ERROR;
|
|
if (bytes_read)
|
|
*bytes_read = ret;
|
|
#endif
|
|
|
|
return AE_OK;
|
|
}
|
|
EXPORT_SYMBOL(acpi_os_get_line);
|
|
|
|
acpi_status acpi_os_wait_command_ready(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = acpi_debugger_wait_command_ready();
|
|
if (ret < 0)
|
|
return AE_ERROR;
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_notify_command_complete(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = acpi_debugger_notify_command_complete();
|
|
if (ret < 0)
|
|
return AE_ERROR;
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_signal(u32 function, void *info)
|
|
{
|
|
switch (function) {
|
|
case ACPI_SIGNAL_FATAL:
|
|
pr_err("Fatal opcode executed\n");
|
|
break;
|
|
case ACPI_SIGNAL_BREAKPOINT:
|
|
/*
|
|
* AML Breakpoint
|
|
* ACPI spec. says to treat it as a NOP unless
|
|
* you are debugging. So if/when we integrate
|
|
* AML debugger into the kernel debugger its
|
|
* hook will go here. But until then it is
|
|
* not useful to print anything on breakpoints.
|
|
*/
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int __init acpi_os_name_setup(char *str)
|
|
{
|
|
char *p = acpi_os_name;
|
|
int count = ACPI_MAX_OVERRIDE_LEN - 1;
|
|
|
|
if (!str || !*str)
|
|
return 0;
|
|
|
|
for (; count-- && *str; str++) {
|
|
if (isalnum(*str) || *str == ' ' || *str == ':')
|
|
*p++ = *str;
|
|
else if (*str == '\'' || *str == '"')
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
*p = 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
__setup("acpi_os_name=", acpi_os_name_setup);
|
|
|
|
/*
|
|
* Disable the auto-serialization of named objects creation methods.
|
|
*
|
|
* This feature is enabled by default. It marks the AML control methods
|
|
* that contain the opcodes to create named objects as "Serialized".
|
|
*/
|
|
static int __init acpi_no_auto_serialize_setup(char *str)
|
|
{
|
|
acpi_gbl_auto_serialize_methods = FALSE;
|
|
pr_info("Auto-serialization disabled\n");
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
|
|
|
|
/* Check of resource interference between native drivers and ACPI
|
|
* OperationRegions (SystemIO and System Memory only).
|
|
* IO ports and memory declared in ACPI might be used by the ACPI subsystem
|
|
* in arbitrary AML code and can interfere with legacy drivers.
|
|
* acpi_enforce_resources= can be set to:
|
|
*
|
|
* - strict (default) (2)
|
|
* -> further driver trying to access the resources will not load
|
|
* - lax (1)
|
|
* -> further driver trying to access the resources will load, but you
|
|
* get a system message that something might go wrong...
|
|
*
|
|
* - no (0)
|
|
* -> ACPI Operation Region resources will not be registered
|
|
*
|
|
*/
|
|
#define ENFORCE_RESOURCES_STRICT 2
|
|
#define ENFORCE_RESOURCES_LAX 1
|
|
#define ENFORCE_RESOURCES_NO 0
|
|
|
|
static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
|
|
|
|
static int __init acpi_enforce_resources_setup(char *str)
|
|
{
|
|
if (str == NULL || *str == '\0')
|
|
return 0;
|
|
|
|
if (!strcmp("strict", str))
|
|
acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
|
|
else if (!strcmp("lax", str))
|
|
acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
|
|
else if (!strcmp("no", str))
|
|
acpi_enforce_resources = ENFORCE_RESOURCES_NO;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
|
|
|
|
/* Check for resource conflicts between ACPI OperationRegions and native
|
|
* drivers */
|
|
int acpi_check_resource_conflict(const struct resource *res)
|
|
{
|
|
acpi_adr_space_type space_id;
|
|
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
|
|
return 0;
|
|
|
|
if (res->flags & IORESOURCE_IO)
|
|
space_id = ACPI_ADR_SPACE_SYSTEM_IO;
|
|
else if (res->flags & IORESOURCE_MEM)
|
|
space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
|
|
else
|
|
return 0;
|
|
|
|
if (!acpi_check_address_range(space_id, res->start, resource_size(res), 1))
|
|
return 0;
|
|
|
|
pr_info("Resource conflict; ACPI support missing from driver?\n");
|
|
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
|
|
return -EBUSY;
|
|
|
|
if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
|
|
pr_notice("Resource conflict: System may be unstable or behave erratically\n");
|
|
|
|
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 = DEFINE_RES_IO_NAMED(start, n, name);
|
|
|
|
return acpi_check_resource_conflict(&res);
|
|
}
|
|
EXPORT_SYMBOL(acpi_check_region);
|
|
|
|
static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
|
|
void *_res, void **return_value)
|
|
{
|
|
struct acpi_mem_space_context **mem_ctx;
|
|
union acpi_operand_object *handler_obj;
|
|
union acpi_operand_object *region_obj2;
|
|
union acpi_operand_object *region_obj;
|
|
struct resource *res = _res;
|
|
acpi_status status;
|
|
|
|
region_obj = acpi_ns_get_attached_object(handle);
|
|
if (!region_obj)
|
|
return AE_OK;
|
|
|
|
handler_obj = region_obj->region.handler;
|
|
if (!handler_obj)
|
|
return AE_OK;
|
|
|
|
if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
|
|
return AE_OK;
|
|
|
|
if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE))
|
|
return AE_OK;
|
|
|
|
region_obj2 = acpi_ns_get_secondary_object(region_obj);
|
|
if (!region_obj2)
|
|
return AE_OK;
|
|
|
|
mem_ctx = (void *)®ion_obj2->extra.region_context;
|
|
|
|
if (!(mem_ctx[0]->address >= res->start &&
|
|
mem_ctx[0]->address < res->end))
|
|
return AE_OK;
|
|
|
|
status = handler_obj->address_space.setup(region_obj,
|
|
ACPI_REGION_DEACTIVATE,
|
|
NULL, (void **)mem_ctx);
|
|
if (ACPI_SUCCESS(status))
|
|
region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* acpi_release_memory - Release any mappings done to a memory region
|
|
* @handle: Handle to namespace node
|
|
* @res: Memory resource
|
|
* @level: A level that terminates the search
|
|
*
|
|
* Walks through @handle and unmaps all SystemMemory Operation Regions that
|
|
* overlap with @res and that have already been activated (mapped).
|
|
*
|
|
* This is a helper that allows drivers to place special requirements on memory
|
|
* region that may overlap with operation regions, primarily allowing them to
|
|
* safely map the region as non-cached memory.
|
|
*
|
|
* The unmapped Operation Regions will be automatically remapped next time they
|
|
* are called, so the drivers do not need to do anything else.
|
|
*/
|
|
acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
|
|
u32 level)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!(res->flags & IORESOURCE_MEM))
|
|
return AE_TYPE;
|
|
|
|
status = acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
|
|
acpi_deactivate_mem_region, NULL,
|
|
res, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
|
|
/*
|
|
* Wait for all of the mappings queued up for removal by
|
|
* acpi_deactivate_mem_region() to actually go away.
|
|
*/
|
|
synchronize_rcu();
|
|
rcu_barrier();
|
|
flush_scheduled_work();
|
|
|
|
return AE_OK;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_release_memory);
|
|
|
|
/*
|
|
* Let drivers know whether the resource checks are effective
|
|
*/
|
|
int acpi_resources_are_enforced(void)
|
|
{
|
|
return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
|
|
}
|
|
EXPORT_SYMBOL(acpi_resources_are_enforced);
|
|
|
|
/*
|
|
* Deallocate the memory for a spinlock.
|
|
*/
|
|
void acpi_os_delete_lock(acpi_spinlock handle)
|
|
{
|
|
ACPI_FREE(handle);
|
|
}
|
|
|
|
/*
|
|
* Acquire a spinlock.
|
|
*
|
|
* handle is a pointer to the spinlock_t.
|
|
*/
|
|
|
|
acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
|
|
__acquires(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)
|
|
__releases(lockp)
|
|
{
|
|
spin_unlock_irqrestore(lockp, flags);
|
|
}
|
|
|
|
#ifndef ACPI_USE_LOCAL_CACHE
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_create_cache
|
|
*
|
|
* PARAMETERS: name - Ascii name for the cache
|
|
* size - Size of each cached object
|
|
* depth - Maximum depth of the cache (in objects) <ignored>
|
|
* cache - Where the new cache object is returned
|
|
*
|
|
* RETURN: status
|
|
*
|
|
* DESCRIPTION: Create a cache object
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
|
|
{
|
|
*cache = kmem_cache_create(name, size, 0, 0, NULL);
|
|
if (*cache == NULL)
|
|
return AE_ERROR;
|
|
else
|
|
return AE_OK;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_purge_cache
|
|
*
|
|
* PARAMETERS: Cache - Handle to cache object
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Free all objects within the requested cache.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
|
|
{
|
|
kmem_cache_shrink(cache);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_delete_cache
|
|
*
|
|
* PARAMETERS: Cache - Handle to cache object
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Free all objects within the requested cache and delete the
|
|
* cache object.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
|
|
{
|
|
kmem_cache_destroy(cache);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_release_object
|
|
*
|
|
* PARAMETERS: Cache - Handle to cache object
|
|
* Object - The object to be released
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Release an object to the specified cache. If cache is full,
|
|
* the object is deleted.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
|
|
{
|
|
kmem_cache_free(cache, object);
|
|
return (AE_OK);
|
|
}
|
|
#endif
|
|
|
|
static int __init acpi_no_static_ssdt_setup(char *s)
|
|
{
|
|
acpi_gbl_disable_ssdt_table_install = TRUE;
|
|
pr_info("Static SSDT installation disabled\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
|
|
|
|
static int __init acpi_disable_return_repair(char *s)
|
|
{
|
|
pr_notice("Predefined validation mechanism disabled\n");
|
|
acpi_gbl_disable_auto_repair = TRUE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpica_no_return_repair", acpi_disable_return_repair);
|
|
|
|
acpi_status __init acpi_os_initialize(void)
|
|
{
|
|
acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
|
|
acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
|
|
|
|
acpi_gbl_xgpe0_block_logical_address =
|
|
(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
|
|
acpi_gbl_xgpe1_block_logical_address =
|
|
(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
|
|
|
|
if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
|
|
/*
|
|
* Use acpi_os_map_generic_address to pre-map the reset
|
|
* register if it's in system memory.
|
|
*/
|
|
void *rv;
|
|
|
|
rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
|
|
pr_debug("%s: Reset register mapping %s\n", __func__,
|
|
rv ? "successful" : "failed");
|
|
}
|
|
acpi_os_initialized = true;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status __init acpi_os_initialize1(void)
|
|
{
|
|
kacpid_wq = alloc_workqueue("kacpid", 0, 1);
|
|
kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
|
|
kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
|
|
BUG_ON(!kacpid_wq);
|
|
BUG_ON(!kacpi_notify_wq);
|
|
BUG_ON(!kacpi_hotplug_wq);
|
|
acpi_osi_init();
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_terminate(void)
|
|
{
|
|
if (acpi_irq_handler) {
|
|
acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
|
|
acpi_irq_handler);
|
|
}
|
|
|
|
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
|
|
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
|
|
acpi_gbl_xgpe0_block_logical_address = 0UL;
|
|
acpi_gbl_xgpe1_block_logical_address = 0UL;
|
|
|
|
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
|
|
acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
|
|
|
|
if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
|
|
acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
|
|
|
|
destroy_workqueue(kacpid_wq);
|
|
destroy_workqueue(kacpi_notify_wq);
|
|
destroy_workqueue(kacpi_hotplug_wq);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
|
|
u32 pm1b_control)
|
|
{
|
|
int rc = 0;
|
|
if (__acpi_os_prepare_sleep)
|
|
rc = __acpi_os_prepare_sleep(sleep_state,
|
|
pm1a_control, pm1b_control);
|
|
if (rc < 0)
|
|
return AE_ERROR;
|
|
else if (rc > 0)
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
|
|
u32 pm1a_ctrl, u32 pm1b_ctrl))
|
|
{
|
|
__acpi_os_prepare_sleep = func;
|
|
}
|
|
|
|
#if (ACPI_REDUCED_HARDWARE)
|
|
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
|
|
u32 val_b)
|
|
{
|
|
int rc = 0;
|
|
if (__acpi_os_prepare_extended_sleep)
|
|
rc = __acpi_os_prepare_extended_sleep(sleep_state,
|
|
val_a, val_b);
|
|
if (rc < 0)
|
|
return AE_ERROR;
|
|
else if (rc > 0)
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
return AE_OK;
|
|
}
|
|
#else
|
|
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
|
|
u32 val_b)
|
|
{
|
|
return AE_OK;
|
|
}
|
|
#endif
|
|
|
|
void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
|
|
u32 val_a, u32 val_b))
|
|
{
|
|
__acpi_os_prepare_extended_sleep = func;
|
|
}
|
|
|
|
acpi_status acpi_os_enter_sleep(u8 sleep_state,
|
|
u32 reg_a_value, u32 reg_b_value)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_gbl_reduced_hardware)
|
|
status = acpi_os_prepare_extended_sleep(sleep_state,
|
|
reg_a_value,
|
|
reg_b_value);
|
|
else
|
|
status = acpi_os_prepare_sleep(sleep_state,
|
|
reg_a_value, reg_b_value);
|
|
return status;
|
|
}
|