| /* |
| * acpi_osl.c - OS-dependent functions ($Revision: 83 $) |
| * |
| * Copyright (C) 2000 Andrew Henroid |
| * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/kmod.h> |
| #include <linux/delay.h> |
| #include <linux/dmi.h> |
| #include <linux/workqueue.h> |
| #include <linux/nmi.h> |
| #include <linux/acpi.h> |
| #include <acpi/acpi.h> |
| #include <asm/io.h> |
| #include <acpi/acpi_bus.h> |
| #include <acpi/processor.h> |
| #include <asm/uaccess.h> |
| |
| #include <linux/efi.h> |
| |
| #define _COMPONENT ACPI_OS_SERVICES |
| ACPI_MODULE_NAME("osl"); |
| #define PREFIX "ACPI: " |
| struct acpi_os_dpc { |
| acpi_osd_exec_callback function; |
| void *context; |
| struct work_struct work; |
| }; |
| |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| #include CONFIG_ACPI_CUSTOM_DSDT_FILE |
| #endif |
| |
| #ifdef ENABLE_DEBUGGER |
| #include <linux/kdb.h> |
| |
| /* stuff for debugger support */ |
| int acpi_in_debugger; |
| EXPORT_SYMBOL(acpi_in_debugger); |
| |
| extern char line_buf[80]; |
| #endif /*ENABLE_DEBUGGER */ |
| |
| static unsigned int acpi_irq_irq; |
| static acpi_osd_handler acpi_irq_handler; |
| static void *acpi_irq_context; |
| static struct workqueue_struct *kacpid_wq; |
| static struct workqueue_struct *kacpi_notify_wq; |
| |
| #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
| static char osi_additional_string[OSI_STRING_LENGTH_MAX]; |
| |
| /* |
| * "Ode to _OSI(Linux)" |
| * |
| * osi_linux -- Control response to BIOS _OSI(Linux) query. |
| * |
| * As Linux evolves, the features that it supports change. |
| * So an OSI string such as "Linux" is not specific enough |
| * to be useful across multiple versions of Linux. It |
| * doesn't identify any particular feature, interface, |
| * or even any particular version of Linux... |
| * |
| * Unfortunately, Linux-2.6.22 and earlier responded "yes" |
| * to a BIOS _OSI(Linux) query. When |
| * a reference mobile BIOS started using it, its use |
| * started to spread to many vendor platforms. |
| * As it is not supportable, we need to halt that spread. |
| * |
| * Today, most BIOS references to _OSI(Linux) are noise -- |
| * they have no functional effect and are just dead code |
| * carried over from the reference BIOS. |
| * |
| * The next most common case is that _OSI(Linux) harms Linux, |
| * usually by causing the BIOS to follow paths that are |
| * not tested during Windows validation. |
| * |
| * Finally, there is a short list of platforms |
| * where OSI(Linux) benefits Linux. |
| * |
| * In Linux-2.6.23, OSI(Linux) is first disabled by default. |
| * DMI is used to disable the dmesg warning about OSI(Linux) |
| * on platforms where it is known to have no effect. |
| * But a dmesg warning remains for systems where |
| * we do not know if OSI(Linux) is good or bad for the system. |
| * DMI is also used to enable OSI(Linux) for the machines |
| * that are known to need it. |
| * |
| * BIOS writers should NOT query _OSI(Linux) on future systems. |
| * It will be ignored by default, and to get Linux to |
| * not ignore it will require a kernel source update to |
| * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation. |
| */ |
| #define OSI_LINUX_ENABLE 0 |
| |
| struct osi_linux { |
| unsigned int enable:1; |
| unsigned int dmi:1; |
| unsigned int cmdline:1; |
| unsigned int known:1; |
| } osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0}; |
| |
| static void __init acpi_request_region (struct acpi_generic_address *addr, |
| unsigned int length, char *desc) |
| { |
| struct resource *res; |
| |
| if (!addr->address || !length) |
| return; |
| |
| if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
| res = request_region(addr->address, length, desc); |
| else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| res = request_mem_region(addr->address, length, desc); |
| } |
| |
| static int __init acpi_reserve_resources(void) |
| { |
| acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
| "ACPI PM1a_EVT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
| "ACPI PM1b_EVT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
| "ACPI PM1a_CNT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
| "ACPI PM1b_CNT_BLK"); |
| |
| if (acpi_gbl_FADT.pm_timer_length == 4) |
| acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
| "ACPI PM2_CNT_BLK"); |
| |
| /* Length of GPE blocks must be a non-negative multiple of 2 */ |
| |
| if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
| acpi_request_region(&acpi_gbl_FADT.xgpe0_block, |
| acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); |
| |
| if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
| acpi_request_region(&acpi_gbl_FADT.xgpe1_block, |
| acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); |
| |
| return 0; |
| } |
| device_initcall(acpi_reserve_resources); |
| |
| acpi_status __init acpi_os_initialize(void) |
| { |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_initialize1(void) |
| { |
| /* |
| * Initialize PCI configuration space access, as we'll need to access |
| * it while walking the namespace (bus 0 and root bridges w/ _BBNs). |
| */ |
| if (!raw_pci_ops) { |
| printk(KERN_ERR PREFIX |
| "Access to PCI configuration space unavailable\n"); |
| return AE_NULL_ENTRY; |
| } |
| kacpid_wq = create_singlethread_workqueue("kacpid"); |
| kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
| BUG_ON(!kacpid_wq); |
| BUG_ON(!kacpi_notify_wq); |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_terminate(void) |
| { |
| if (acpi_irq_handler) { |
| acpi_os_remove_interrupt_handler(acpi_irq_irq, |
| acpi_irq_handler); |
| } |
| |
| destroy_workqueue(kacpid_wq); |
| destroy_workqueue(kacpi_notify_wq); |
| |
| return AE_OK; |
| } |
| |
| void acpi_os_printf(const char *fmt, ...) |
| { |
| va_list args; |
| va_start(args, fmt); |
| acpi_os_vprintf(fmt, args); |
| va_end(args); |
| } |
| |
| EXPORT_SYMBOL(acpi_os_printf); |
| |
| void acpi_os_vprintf(const char *fmt, va_list args) |
| { |
| static char buffer[512]; |
| |
| vsprintf(buffer, fmt, args); |
| |
| #ifdef ENABLE_DEBUGGER |
| if (acpi_in_debugger) { |
| kdb_printf("%s", buffer); |
| } else { |
| printk("%s", buffer); |
| } |
| #else |
| printk("%s", buffer); |
| #endif |
| } |
| |
| acpi_physical_address __init acpi_os_get_root_pointer(void) |
| { |
| if (efi_enabled) { |
| if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
| return efi.acpi20; |
| else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
| return efi.acpi; |
| else { |
| printk(KERN_ERR PREFIX |
| "System description tables not found\n"); |
| return 0; |
| } |
| } else |
| return acpi_find_rsdp(); |
| } |
| |
| void __iomem *acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
| { |
| if (phys > ULONG_MAX) { |
| printk(KERN_ERR PREFIX "Cannot map memory that high\n"); |
| return NULL; |
| } |
| if (acpi_gbl_permanent_mmap) |
| /* |
| * ioremap checks to ensure this is in reserved space |
| */ |
| return ioremap((unsigned long)phys, size); |
| else |
| return __acpi_map_table((unsigned long)phys, size); |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
| |
| void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
| { |
| if (acpi_gbl_permanent_mmap) { |
| iounmap(virt); |
| } |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
| |
| #ifdef ACPI_FUTURE_USAGE |
| acpi_status |
| acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
| { |
| if (!phys || !virt) |
| return AE_BAD_PARAMETER; |
| |
| *phys = virt_to_phys(virt); |
| |
| return AE_OK; |
| } |
| #endif |
| |
| #define ACPI_MAX_OVERRIDE_LEN 100 |
| |
| static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; |
| |
| acpi_status |
| acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
| acpi_string * new_val) |
| { |
| if (!init_val || !new_val) |
| return AE_BAD_PARAMETER; |
| |
| *new_val = NULL; |
| if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
| printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
| acpi_os_name); |
| *new_val = acpi_os_name; |
| } |
| |
| return AE_OK; |
| } |
| |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
| struct acpi_table_header *acpi_find_dsdt_initrd(void) |
| { |
| struct file *firmware_file; |
| mm_segment_t oldfs; |
| unsigned long len, len2; |
| struct acpi_table_header *dsdt_buffer, *ret = NULL; |
| struct kstat stat; |
| char *ramfs_dsdt_name = "/DSDT.aml"; |
| |
| printk(KERN_INFO PREFIX "Looking for DSDT in initramfs... "); |
| |
| /* |
| * Never do this at home, only the user-space is allowed to open a file. |
| * The clean way would be to use the firmware loader. But this code must be run |
| * before there is any userspace available. So we need a static/init firmware |
| * infrastructure, which doesn't exist yet... |
| */ |
| if (vfs_stat(ramfs_dsdt_name, &stat) < 0) { |
| printk("not found.\n"); |
| return ret; |
| } |
| |
| len = stat.size; |
| /* check especially against empty files */ |
| if (len <= 4) { |
| printk("error, file is too small: only %lu bytes.\n", len); |
| return ret; |
| } |
| |
| firmware_file = filp_open(ramfs_dsdt_name, O_RDONLY, 0); |
| if (IS_ERR(firmware_file)) { |
| printk("error, could not open file %s.\n", ramfs_dsdt_name); |
| return ret; |
| } |
| |
| dsdt_buffer = ACPI_ALLOCATE(len); |
| if (!dsdt_buffer) { |
| printk("error when allocating %lu bytes of memory.\n", len); |
| goto err; |
| } |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| len2 = vfs_read(firmware_file, (char __user *)dsdt_buffer, len, &firmware_file->f_pos); |
| set_fs(oldfs); |
| if (len2 < len) { |
| printk("error trying to read %lu bytes from %s.\n", len, ramfs_dsdt_name); |
| ACPI_FREE(dsdt_buffer); |
| goto err; |
| } |
| |
| printk("successfully read %lu bytes from %s.\n", len, ramfs_dsdt_name); |
| ret = dsdt_buffer; |
| err: |
| filp_close(firmware_file, NULL); |
| return ret; |
| } |
| #endif |
| |
| acpi_status |
| acpi_os_table_override(struct acpi_table_header * existing_table, |
| struct acpi_table_header ** new_table) |
| { |
| if (!existing_table || !new_table) |
| return AE_BAD_PARAMETER; |
| |
| *new_table = NULL; |
| |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| if (strncmp(existing_table->signature, "DSDT", 4) == 0) |
| *new_table = (struct acpi_table_header *)AmlCode; |
| #endif |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
| if (strncmp(existing_table->signature, "DSDT", 4) == 0) { |
| struct acpi_table_header *initrd_table = acpi_find_dsdt_initrd(); |
| if (initrd_table) |
| *new_table = initrd_table; |
| } |
| #endif |
| return AE_OK; |
| } |
| |
| static irqreturn_t acpi_irq(int irq, void *dev_id) |
| { |
| return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; |
| } |
| |
| acpi_status |
| acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
| void *context) |
| { |
| unsigned int irq; |
| |
| /* |
| * Ignore the GSI from the core, and use the value in our copy of the |
| * FADT. It may not be the same if an interrupt source override exists |
| * for the SCI. |
| */ |
| gsi = acpi_gbl_FADT.sci_interrupt; |
| if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
| printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", |
| gsi); |
| return AE_OK; |
| } |
| |
| acpi_irq_handler = handler; |
| acpi_irq_context = context; |
| if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
| printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
| return AE_NOT_ACQUIRED; |
| } |
| acpi_irq_irq = irq; |
| |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
| { |
| if (irq) { |
| free_irq(irq, acpi_irq); |
| acpi_irq_handler = NULL; |
| acpi_irq_irq = 0; |
| } |
| |
| return AE_OK; |
| } |
| |
| /* |
| * Running in interpreter thread context, safe to sleep |
| */ |
| |
| void acpi_os_sleep(acpi_integer ms) |
| { |
| schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
| } |
| |
| EXPORT_SYMBOL(acpi_os_sleep); |
| |
| void acpi_os_stall(u32 us) |
| { |
| while (us) { |
| u32 delay = 1000; |
| |
| if (delay > us) |
| delay = us; |
| udelay(delay); |
| touch_nmi_watchdog(); |
| us -= delay; |
| } |
| } |
| |
| EXPORT_SYMBOL(acpi_os_stall); |
| |
| /* |
| * Support ACPI 3.0 AML Timer operand |
| * Returns 64-bit free-running, monotonically increasing timer |
| * with 100ns granularity |
| */ |
| u64 acpi_os_get_timer(void) |
| { |
| static u64 t; |
| |
| #ifdef CONFIG_HPET |
| /* TBD: use HPET if available */ |
| #endif |
| |
| #ifdef CONFIG_X86_PM_TIMER |
| /* TBD: default to PM timer if HPET was not available */ |
| #endif |
| if (!t) |
| printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); |
| |
| return ++t; |
| } |
| |
| acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
| { |
| u32 dummy; |
| |
| if (!value) |
| value = &dummy; |
| |
| *value = 0; |
| if (width <= 8) { |
| *(u8 *) value = inb(port); |
| } else if (width <= 16) { |
| *(u16 *) value = inw(port); |
| } else if (width <= 32) { |
| *(u32 *) value = inl(port); |
| } else { |
| BUG(); |
| } |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_read_port); |
| |
| acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
| { |
| if (width <= 8) { |
| outb(value, port); |
| } else if (width <= 16) { |
| outw(value, port); |
| } else if (width <= 32) { |
| outl(value, port); |
| } else { |
| BUG(); |
| } |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_write_port); |
| |
| acpi_status |
| acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
| { |
| u32 dummy; |
| void __iomem *virt_addr; |
| |
| virt_addr = ioremap(phys_addr, width); |
| if (!value) |
| value = &dummy; |
| |
| switch (width) { |
| case 8: |
| *(u8 *) value = readb(virt_addr); |
| break; |
| case 16: |
| *(u16 *) value = readw(virt_addr); |
| break; |
| case 32: |
| *(u32 *) value = readl(virt_addr); |
| break; |
| default: |
| BUG(); |
| } |
| |
| iounmap(virt_addr); |
| |
| return AE_OK; |
| } |
| |
| 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, |
| void *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; |
| } |
| |
| BUG_ON(!raw_pci_ops); |
| |
| result = raw_pci_ops->read(pci_id->segment, pci_id->bus, |
| PCI_DEVFN(pci_id->device, pci_id->function), |
| reg, size, value); |
| |
| return (result ? AE_ERROR : AE_OK); |
| } |
| |
| EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
| |
| 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; |
| } |
| |
| BUG_ON(!raw_pci_ops); |
| |
| result = raw_pci_ops->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 temp; |
| acpi_object_type type; |
| u8 tu8; |
| |
| 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)) { |
| 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, &tu8, |
| 8); |
| if (ACPI_SUCCESS(status) |
| && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { |
| status = |
| acpi_os_read_pci_configuration(pci_id, 0x18, |
| &tu8, 8); |
| if (!ACPI_SUCCESS(status)) { |
| /* Certainly broken... FIX ME */ |
| return; |
| } |
| *is_bridge = 1; |
| pci_id->bus = tu8; |
| status = |
| acpi_os_read_pci_configuration(pci_id, 0x19, |
| &tu8, 8); |
| if (ACPI_SUCCESS(status)) { |
| *bus_number = tu8; |
| } |
| } 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); |
| |
| /* Yield cpu to notify thread */ |
| cond_resched(); |
| |
| return; |
| } |
| |
| static void acpi_os_execute_notify(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; |
| } |
| |
| /******************************************************************************* |
| * |
| * 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; |
| |
| 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_ACPI_STATUS(AE_NO_MEMORY); |
| |
| dpc->function = function; |
| dpc->context = context; |
| |
| if (type == OSL_NOTIFY_HANDLER) { |
| INIT_WORK(&dpc->work, acpi_os_execute_notify); |
| if (!queue_work(kacpi_notify_wq, &dpc->work)) { |
| status = AE_ERROR; |
| kfree(dpc); |
| } |
| } else { |
| INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| if (!queue_work(kacpid_wq, &dpc->work)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Call to queue_work() failed.\n")); |
| status = AE_ERROR; |
| kfree(dpc); |
| } |
| } |
| return_ACPI_STATUS(status); |
| } |
| |
| EXPORT_SYMBOL(acpi_os_execute); |
| |
| void acpi_os_wait_events_complete(void *context) |
| { |
| flush_workqueue(kacpid_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; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_create_semaphore); |
| |
| /* |
| * 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)); |
| |
| kfree(sem); |
| sem = NULL; |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_delete_semaphore); |
| |
| /* |
| * TODO: The kernel doesn't have a 'down_timeout' function -- had to |
| * improvise. The process is to sleep for one scheduler quantum |
| * until the semaphore becomes available. Downside is that this |
| * may result in starvation for timeout-based waits when there's |
| * lots of semaphore activity. |
| * |
| * 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; |
| 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)); |
| |
| /* |
| * This can be called during resume with interrupts off. |
| * Like boot-time, we should be single threaded and will |
| * always get the lock if we try -- timeout or not. |
| * If this doesn't succeed, then we will oops courtesy of |
| * might_sleep() in down(). |
| */ |
| if (!down_trylock(sem)) |
| return AE_OK; |
| |
| switch (timeout) { |
| /* |
| * No Wait: |
| * -------- |
| * A zero timeout value indicates that we shouldn't wait - just |
| * acquire the semaphore if available otherwise return AE_TIME |
| * (a.k.a. 'would block'). |
| */ |
| case 0: |
| if (down_trylock(sem)) |
| status = AE_TIME; |
| break; |
| |
| /* |
| * Wait Indefinitely: |
| * ------------------ |
| */ |
| case ACPI_WAIT_FOREVER: |
| down(sem); |
| break; |
| |
| /* |
| * Wait w/ Timeout: |
| * ---------------- |
| */ |
| default: |
| // TODO: A better timeout algorithm? |
| { |
| int i = 0; |
| static const int quantum_ms = 1000 / HZ; |
| |
| ret = down_trylock(sem); |
| for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) { |
| schedule_timeout_interruptible(1); |
| ret = down_trylock(sem); |
| } |
| |
| if (ret != 0) |
| status = AE_TIME; |
| } |
| break; |
| } |
| |
| 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; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_wait_semaphore); |
| |
| /* |
| * 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; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_signal_semaphore); |
| |
| #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; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_signal); |
| |
| 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 |
| */ |
| static 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); |
| |
| /* |
| * 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); |
| } |
| |
| /** |
| * acpi_dmi_dump - dump DMI slots needed for blacklist entry |
| * |
| * Returns 0 on success |
| */ |
| int acpi_dmi_dump(void) |
| { |
| |
| if (!dmi_available) |
| return -1; |
| |
| printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n", |
| dmi_get_slot(DMI_SYS_VENDOR)); |
| printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n", |
| dmi_get_slot(DMI_PRODUCT_NAME)); |
| printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n", |
| dmi_get_slot(DMI_PRODUCT_VERSION)); |
| printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n", |
| dmi_get_slot(DMI_BOARD_NAME)); |
| printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n", |
| dmi_get_slot(DMI_BIOS_VENDOR)); |
| printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n", |
| dmi_get_slot(DMI_BIOS_DATE)); |
| |
| return 0; |
| } |
| |
| |
| /****************************************************************************** |
| * |
| * 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.dmi) { |
| if (acpi_dmi_dump()) |
| printk(KERN_NOTICE PREFIX |
| "[please extract dmidecode output]\n"); |
| printk(KERN_NOTICE PREFIX |
| "Please send DMI info above to " |
| "linux-acpi@vger.kernel.org\n"); |
| } |
| if (!osi_linux.known && !osi_linux.cmdline) { |
| printk(KERN_NOTICE PREFIX |
| "If \"acpi_osi=%sLinux\" works better, " |
| "please notify linux-acpi@vger.kernel.org\n", |
| osi_linux.enable ? "!" : ""); |
| } |
| |
| 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) |
| { |
| |
| return AE_OK; |
| } |
| |
| #endif |