* 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>
+ * Copyright (c) 2008 Intel Corporation
+ * Author: Matthew Wilcox <willy@linux.intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/pci.h>
-#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/kmod.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/nmi.h>
-#include <linux/kthread.h>
-#include <acpi/acpi.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/jiffies.h>
+#include <linux/semaphore.h>
+
#include <asm/io.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/processor.h>
#include <asm/uaccess.h>
-#include <linux/efi.h>
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/processor.h>
#define _COMPONENT ACPI_OS_SERVICES
-ACPI_MODULE_NAME("osl")
+ACPI_MODULE_NAME("osl");
#define PREFIX "ACPI: "
struct acpi_os_dpc {
acpi_osd_exec_callback function;
void *context;
+ struct work_struct work;
+ int wait;
};
#ifdef CONFIG_ACPI_CUSTOM_DSDT
extern char line_buf[80];
#endif /*ENABLE_DEBUGGER */
-int acpi_specific_hotkey_enabled = TRUE;
-EXPORT_SYMBOL(acpi_specific_hotkey_enabled);
-
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;
+static struct workqueue_struct *kacpi_hotplug_wq;
+
+struct acpi_res_list {
+ resource_size_t start;
+ resource_size_t end;
+ acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
+ char name[5]; /* only can have a length of 4 chars, make use of this
+ one instead of res->name, no need to kalloc then */
+ struct list_head resource_list;
+ int count;
+};
+
+static LIST_HEAD(resource_list_head);
+static DEFINE_SPINLOCK(acpi_res_lock);
-acpi_status acpi_os_initialize(void)
+#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
+static char osi_additional_string[OSI_STRING_LENGTH_MAX];
+
+/*
+ * The story of _OSI(Linux)
+ *
+ * From pre-history through Linux-2.6.22,
+ * Linux responded TRUE upon a BIOS OSI(Linux) query.
+ *
+ * Unfortunately, reference BIOS writers got wind of this
+ * and put OSI(Linux) in their example code, quickly exposing
+ * this string as ill-conceived and opening the door to
+ * an un-bounded number of BIOS incompatibilities.
+ *
+ * For example, OSI(Linux) was used on resume to re-POST a
+ * video card on one system, because Linux at that time
+ * could not do a speedy restore in its native driver.
+ * But then upon gaining quick native restore capability,
+ * Linux has no way to tell the BIOS to skip the time-consuming
+ * POST -- putting Linux at a permanent performance disadvantage.
+ * On another system, the BIOS writer used OSI(Linux)
+ * to infer native OS support for IPMI! On other systems,
+ * OSI(Linux) simply got in the way of Linux claiming to
+ * be compatible with other operating systems, exposing
+ * BIOS issues such as skipped device initialization.
+ *
+ * So "Linux" turned out to be a really poor chose of
+ * OSI string, and from Linux-2.6.23 onward we respond FALSE.
+ *
+ * BIOS writers should NOT query _OSI(Linux) on future systems.
+ * Linux will complain on the console when it sees it, and return FALSE.
+ * To get Linux to return TRUE for your system will require
+ * a kernel source update to add a DMI entry,
+ * or boot with "acpi_osi=Linux"
+ */
+
+static struct osi_linux {
+ unsigned int enable:1;
+ unsigned int dmi:1;
+ unsigned int cmdline:1;
+ unsigned int known:1;
+} osi_linux = { 0, 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;
}
+static void bind_to_cpu0(struct work_struct *work)
+{
+ set_cpus_allowed_ptr(current, cpumask_of(0));
+ kfree(work);
+}
+
+static void bind_workqueue(struct workqueue_struct *wq)
+{
+ struct work_struct *work;
+
+ work = kzalloc(sizeof(struct work_struct), GFP_KERNEL);
+ INIT_WORK(work, bind_to_cpu0);
+ queue_work(wq, work);
+}
+
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).
+ * 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 binding
+ * the workqueues to CPU 0.
*/
- 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");
+ bind_workqueue(kacpid_wq);
+ kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
+ bind_workqueue(kacpi_notify_wq);
+ kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug");
+ bind_workqueue(kacpi_hotplug_wq);
BUG_ON(!kacpid_wq);
-
+ BUG_ON(!kacpi_notify_wq);
+ BUG_ON(!kacpi_hotplug_wq);
return AE_OK;
}
}
destroy_workqueue(kacpid_wq);
+ destroy_workqueue(kacpi_notify_wq);
+ destroy_workqueue(kacpi_hotplug_wq);
return AE_OK;
}
va_end(args);
}
-EXPORT_SYMBOL(acpi_os_printf);
-
void acpi_os_vprintf(const char *fmt, va_list args)
{
static char buffer[512];
if (acpi_in_debugger) {
kdb_printf("%s", buffer);
} else {
- printk("%s", buffer);
+ printk(KERN_CONT "%s", buffer);
}
#else
- printk("%s", buffer);
+ printk(KERN_CONT "%s", buffer);
#endif
}
-acpi_status acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr)
+acpi_physical_address __init acpi_os_get_root_pointer(void)
{
if (efi_enabled) {
- addr->pointer_type = ACPI_PHYSICAL_POINTER;
if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
- addr->pointer.physical = efi.acpi20;
+ return efi.acpi20;
else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
- addr->pointer.physical = efi.acpi;
+ return efi.acpi;
else {
printk(KERN_ERR PREFIX
"System description tables not found\n");
- return AE_NOT_FOUND;
+ return 0;
}
} else {
- if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) {
- printk(KERN_ERR PREFIX
- "System description tables not found\n");
- return AE_NOT_FOUND;
- }
- }
+ acpi_physical_address pa = 0;
- return AE_OK;
+ acpi_find_root_pointer(&pa);
+ return pa;
+ }
}
-acpi_status
-acpi_os_map_memory(acpi_physical_address phys, acpi_size size,
- void __iomem ** virt)
+void __iomem *__init_refok
+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 AE_BAD_PARAMETER;
+ return NULL;
}
- /*
- * ioremap checks to ensure this is in reserved space
- */
- *virt = ioremap((unsigned long)phys, size);
-
- if (!*virt)
- return AE_NO_MEMORY;
-
- return AE_OK;
+ 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)
+void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
{
- iounmap(virt);
+ if (acpi_gbl_permanent_mmap)
+ iounmap(virt);
+ else
+ __acpi_unmap_table(virt, size);
}
EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
+void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
+{
+ if (!acpi_gbl_permanent_mmap)
+ __acpi_unmap_table(virt, size);
+}
+
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
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;
- else
- *new_table = NULL;
-#else
- *new_table = NULL;
#endif
+ if (*new_table != NULL) {
+ printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
+ "this is unsafe: tainting kernel\n",
+ existing_table->signature,
+ existing_table->oem_table_id);
+ add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
+ }
return AE_OK;
}
-static irqreturn_t acpi_irq(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t acpi_irq(int irq, void *dev_id)
{
- return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE;
+ 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
{
unsigned int irq;
+ acpi_irq_stats_init();
+
/*
* 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_fadt.sci_int;
+ 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);
schedule_timeout_interruptible(msecs_to_jiffies(ms));
}
-EXPORT_SYMBOL(acpi_os_sleep);
-
void acpi_os_stall(u32 us)
{
while (us) {
}
}
-EXPORT_SYMBOL(acpi_os_stall);
-
/*
* Support ACPI 3.0 AML Timer operand
* Returns 64-bit free-running, monotonically increasing timer
if (!value)
value = &dummy;
- switch (width) {
- case 8:
+ *value = 0;
+ if (width <= 8) {
*(u8 *) value = inb(port);
- break;
- case 16:
+ } else if (width <= 16) {
*(u16 *) value = inw(port);
- break;
- case 32:
+ } else if (width <= 32) {
*(u32 *) value = inl(port);
- break;
- default:
+ } else {
BUG();
}
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
{
- switch (width) {
- case 8:
+ if (width <= 8) {
outb(value, port);
- break;
- case 16:
+ } else if (width <= 16) {
outw(value, port);
- break;
- case 32:
+ } else if (width <= 32) {
outl(value, port);
- break;
- default:
+ } else {
BUG();
}
acpi_status
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
- void *value, u32 width)
+ u32 *value, u32 width)
{
int result, size;
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);
+ result = raw_pci_read(pci_id->segment, pci_id->bus,
+ PCI_DEVFN(pci_id->device, pci_id->function),
+ reg, size, value);
return (result ? AE_ERROR : AE_OK);
}
-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)
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);
+ 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);
}
acpi_handle handle;
struct acpi_pci_id *pci_id = *id;
acpi_status status;
- unsigned long temp;
+ unsigned long long temp;
acpi_object_type type;
- u8 tu8;
acpi_get_parent(chandle, &handle);
if (handle != rhandle) {
if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
return;
- status =
- acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
+ status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
&temp);
if (ACPI_SUCCESS(status)) {
+ u32 val;
pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
/* any nicer way to get bus number of bridge ? */
status =
- acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8,
+ acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
8);
if (ACPI_SUCCESS(status)
- && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) {
+ && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
status =
acpi_os_read_pci_configuration(pci_id, 0x18,
- &tu8, 8);
+ &val, 8);
if (!ACPI_SUCCESS(status)) {
/* Certainly broken... FIX ME */
return;
}
*is_bridge = 1;
- pci_id->bus = tu8;
+ pci_id->bus = val;
status =
acpi_os_read_pci_configuration(pci_id, 0x19,
- &tu8, 8);
+ &val, 8);
if (ACPI_SUCCESS(status)) {
- *bus_number = tu8;
+ *bus_number = val;
}
} else
*is_bridge = 0;
acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
}
-static void acpi_os_execute_deferred(void *context)
+static void acpi_os_execute_deferred(struct work_struct *work)
{
- struct acpi_os_dpc *dpc = NULL;
-
+ struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
- dpc = (struct acpi_os_dpc *)context;
- if (!dpc) {
- printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
- return;
- }
+ if (dpc->wait)
+ acpi_os_wait_events_complete(NULL);
dpc->function(dpc->context);
-
kfree(dpc);
-
- return;
-}
-
-static int acpi_os_execute_thread(void *context)
-{
- struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context;
- if (dpc) {
- dpc->function(dpc->context);
- kfree(dpc);
- }
- do_exit(0);
}
/*******************************************************************************
*
******************************************************************************/
-acpi_status acpi_os_execute(acpi_execute_type type,
- acpi_osd_exec_callback function, void *context)
+static acpi_status __acpi_os_execute(acpi_execute_type type,
+ acpi_osd_exec_callback function, void *context, int hp)
{
acpi_status status = AE_OK;
struct acpi_os_dpc *dpc;
- struct work_struct *task;
- struct task_struct *p;
+ struct workqueue_struct *queue;
+ int ret;
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Scheduling function [%p(%p)] for deferred execution.\n",
+ function, context));
- if (!function)
- return AE_BAD_PARAMETER;
/*
* Allocate/initialize DPC structure. Note that this memory will be
- * freed by the callee. The kernel handles the tq_struct list in a
+ * 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 tq_struct.
- * We can save time and code by allocating the DPC and tq_structs
- * from the same memory.
+ * having a static work_struct.
*/
- if (type == OSL_NOTIFY_HANDLER) {
- dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_KERNEL);
- } else {
- dpc = kmalloc(sizeof(struct acpi_os_dpc) +
- sizeof(struct work_struct), GFP_ATOMIC);
- }
+
+ dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
if (!dpc)
return AE_NO_MEMORY;
+
dpc->function = function;
dpc->context = context;
- if (type == OSL_NOTIFY_HANDLER) {
- p = kthread_create(acpi_os_execute_thread, dpc, "kacpid_notify");
- if (!IS_ERR(p)) {
- wake_up_process(p);
- } else {
- status = AE_NO_MEMORY;
- kfree(dpc);
- }
- } else {
- task = (void *)(dpc + 1);
- INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc);
- if (!queue_work(kacpid_wq, task)) {
- status = AE_ERROR;
- kfree(dpc);
- }
+ /*
+ * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
+ * because the hotplug code may call driver .remove() functions,
+ * which invoke flush_scheduled_work/acpi_os_wait_events_complete
+ * to flush these workqueues.
+ */
+ queue = hp ? kacpi_hotplug_wq :
+ (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq);
+ dpc->wait = hp ? 1 : 0;
+ INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+ ret = queue_work(queue, &dpc->work);
+
+ if (!ret) {
+ printk(KERN_ERR PREFIX
+ "Call to queue_work() failed.\n");
+ status = AE_ERROR;
+ kfree(dpc);
}
return status;
}
+acpi_status acpi_os_execute(acpi_execute_type type,
+ acpi_osd_exec_callback function, void *context)
+{
+ return __acpi_os_execute(type, function, context, 0);
+}
EXPORT_SYMBOL(acpi_os_execute);
+acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
+ void *context)
+{
+ return __acpi_os_execute(0, function, context, 1);
+}
+
void acpi_os_wait_events_complete(void *context)
{
flush_workqueue(kacpid_wq);
+ flush_workqueue(kacpi_notify_wq);
}
EXPORT_SYMBOL(acpi_os_wait_events_complete);
{
struct semaphore *sem = NULL;
-
sem = acpi_os_allocate(sizeof(struct semaphore));
if (!sem)
return AE_NO_MEMORY;
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
{
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;
}
-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;
+ long jiffies;
int ret = 0;
-
if (!sem || (units < 1))
return AE_BAD_PARAMETER;
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
handle, units, timeout));
- 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 (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,
return status;
}
-EXPORT_SYMBOL(acpi_os_wait_semaphore);
-
/*
* TODO: Support for units > 1?
*/
{
struct semaphore *sem = (struct semaphore *)handle;
-
if (!sem || (units < 1))
return AE_BAD_PARAMETER;
return AE_OK;
}
-EXPORT_SYMBOL(acpi_os_signal_semaphore);
-
#ifdef ACPI_FUTURE_USAGE
u32 acpi_os_get_line(char *buffer)
{
}
#endif /* ACPI_FUTURE_USAGE */
-/* Assumes no unreadable holes inbetween */
-u8 acpi_os_readable(void *ptr, acpi_size len)
-{
-#if defined(__i386__) || defined(__x86_64__)
- char tmp;
- return !__get_user(tmp, (char __user *)ptr)
- && !__get_user(tmp, (char __user *)ptr + len - 1);
-#endif
- return 1;
-}
-
-#ifdef ACPI_FUTURE_USAGE
-u8 acpi_os_writable(void *ptr, acpi_size len)
-{
- /* could do dummy write (racy) or a kernel page table lookup.
- The later may be difficult at early boot when kmap doesn't work yet. */
- return 1;
-}
-#endif
-
acpi_status acpi_os_signal(u32 function, void *info)
{
switch (function) {
return AE_OK;
}
-EXPORT_SYMBOL(acpi_os_signal);
-
static int __init acpi_os_name_setup(char *str)
{
char *p = acpi_os_name;
__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;
+}
+
/*
- * _OSI control
+ * Modify the list of "OS Interfaces" reported to BIOS via _OSI
+ *
* empty string disables _OSI
- * TBD additional string adds to _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)
+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 {
- /* TBD */
- printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n",
- str);
+ } 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_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
-static int __init acpi_hotkey_setup(char *str)
+/* 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)
{
- acpi_specific_hotkey_enabled = FALSE;
+ 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_generic_hotkey", acpi_hotkey_setup);
+__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
-/*
- * max_cstate is defined in the base kernel so modules can
- * change it w/o depending on the state of the processor module.
- */
-unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER;
+/* Check for resource conflicts between ACPI OperationRegions and native
+ * drivers */
+int acpi_check_resource_conflict(struct resource *res)
+{
+ struct acpi_res_list *res_list_elem;
+ int ioport;
+ int clash = 0;
+
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
+ return 0;
+ if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
+ return 0;
+
+ ioport = res->flags & IORESOURCE_IO;
+
+ spin_lock(&acpi_res_lock);
+ list_for_each_entry(res_list_elem, &resource_list_head,
+ resource_list) {
+ if (ioport && (res_list_elem->resource_type
+ != ACPI_ADR_SPACE_SYSTEM_IO))
+ continue;
+ if (!ioport && (res_list_elem->resource_type
+ != ACPI_ADR_SPACE_SYSTEM_MEMORY))
+ continue;
+
+ if (res->end < res_list_elem->start
+ || res_list_elem->end < res->start)
+ continue;
+ clash = 1;
+ break;
+ }
+ spin_unlock(&acpi_res_lock);
+
+ if (clash) {
+ if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
+ printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
+ " conflicts with ACPI region %s"
+ " [0x%llx-0x%llx]\n",
+ acpi_enforce_resources == ENFORCE_RESOURCES_LAX
+ ? KERN_WARNING : KERN_ERR,
+ ioport ? "I/O" : "Memory", res->name,
+ (long long) res->start, (long long) res->end,
+ res_list_elem->name,
+ (long long) res_list_elem->start,
+ (long long) res_list_elem->end);
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
+ printk(KERN_NOTICE "ACPI: This conflict may"
+ " cause random problems and system"
+ " instability\n");
+ printk(KERN_INFO "ACPI: If an ACPI driver is available"
+ " for this device, you should use it instead of"
+ " the native driver\n");
+ }
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
+ return -EBUSY;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(acpi_check_resource_conflict);
+
+int acpi_check_region(resource_size_t start, resource_size_t n,
+ const char *name)
+{
+ struct resource res = {
+ .start = start,
+ .end = start + n - 1,
+ .name = name,
+ .flags = IORESOURCE_IO,
+ };
+
+ return acpi_check_resource_conflict(&res);
+}
+EXPORT_SYMBOL(acpi_check_region);
-EXPORT_SYMBOL(max_cstate);
+int acpi_check_mem_region(resource_size_t start, resource_size_t n,
+ const char *name)
+{
+ struct resource res = {
+ .start = start,
+ .end = start + n - 1,
+ .name = name,
+ .flags = IORESOURCE_MEM,
+ };
+
+ return acpi_check_resource_conflict(&res);
+
+}
+EXPORT_SYMBOL(acpi_check_mem_region);
/*
* Acquire a spinlock.
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, NULL);
- if (cache == NULL)
+ *cache = kmem_cache_create(name, size, 0, 0, NULL);
+ if (*cache == NULL)
return AE_ERROR;
else
return AE_OK;
acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
{
- (void)kmem_cache_shrink(cache);
+ kmem_cache_shrink(cache);
return (AE_OK);
}
acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
{
- (void)kmem_cache_destroy(cache);
+ kmem_cache_destroy(cache);
return (AE_OK);
}
acpi_status
acpi_os_validate_interface (char *interface)
{
+ if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
+ return AE_OK;
+ if (!strcmp("Linux", interface)) {
+
+ printk(KERN_NOTICE PREFIX
+ "BIOS _OSI(Linux) query %s%s\n",
+ osi_linux.enable ? "honored" : "ignored",
+ osi_linux.cmdline ? " via cmdline" :
+ osi_linux.dmi ? " via DMI" : "");
+
+ if (osi_linux.enable)
+ return AE_OK;
+ }
+ return AE_SUPPORT;
+}
+
+static inline int acpi_res_list_add(struct acpi_res_list *res)
+{
+ struct acpi_res_list *res_list_elem;
+
+ list_for_each_entry(res_list_elem, &resource_list_head,
+ resource_list) {
+
+ if (res->resource_type == res_list_elem->resource_type &&
+ res->start == res_list_elem->start &&
+ res->end == res_list_elem->end) {
+
+ /*
+ * The Region(addr,len) already exist in the list,
+ * just increase the count
+ */
+
+ res_list_elem->count++;
+ return 0;
+ }
+ }
+
+ res->count = 1;
+ list_add(&res->resource_list, &resource_list_head);
+ return 1;
+}
+
+static inline void acpi_res_list_del(struct acpi_res_list *res)
+{
+ struct acpi_res_list *res_list_elem;
+
+ list_for_each_entry(res_list_elem, &resource_list_head,
+ resource_list) {
+
+ if (res->resource_type == res_list_elem->resource_type &&
+ res->start == res_list_elem->start &&
+ res->end == res_list_elem->end) {
+
+ /*
+ * If the res count is decreased to 0,
+ * remove and free it
+ */
- return AE_SUPPORT;
+ if (--res_list_elem->count == 0) {
+ list_del(&res_list_elem->resource_list);
+ kfree(res_list_elem);
+ }
+ return;
+ }
+ }
}
+acpi_status
+acpi_os_invalidate_address(
+ u8 space_id,
+ acpi_physical_address address,
+ acpi_size length)
+{
+ struct acpi_res_list res;
+
+ switch (space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+ /* Only interference checks against SystemIO and SytemMemory
+ are needed */
+ res.start = address;
+ res.end = address + length - 1;
+ res.resource_type = space_id;
+ spin_lock(&acpi_res_lock);
+ acpi_res_list_del(&res);
+ spin_unlock(&acpi_res_lock);
+ break;
+ case ACPI_ADR_SPACE_PCI_CONFIG:
+ case ACPI_ADR_SPACE_EC:
+ case ACPI_ADR_SPACE_SMBUS:
+ case ACPI_ADR_SPACE_CMOS:
+ case ACPI_ADR_SPACE_PCI_BAR_TARGET:
+ case ACPI_ADR_SPACE_DATA_TABLE:
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ break;
+ }
+ return AE_OK;
+}
/******************************************************************************
*
acpi_os_validate_address (
u8 space_id,
acpi_physical_address address,
- acpi_size length)
+ acpi_size length,
+ char *name)
{
+ struct acpi_res_list *res;
+ int added;
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
+ return AE_OK;
- return AE_OK;
+ switch (space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+ /* Only interference checks against SystemIO and SytemMemory
+ are needed */
+ res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
+ if (!res)
+ return AE_OK;
+ /* ACPI names are fixed to 4 bytes, still better use strlcpy */
+ strlcpy(res->name, name, 5);
+ res->start = address;
+ res->end = address + length - 1;
+ res->resource_type = space_id;
+ spin_lock(&acpi_res_lock);
+ added = acpi_res_list_add(res);
+ spin_unlock(&acpi_res_lock);
+ pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, "
+ "name: %s\n", added ? "Added" : "Already exist",
+ (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
+ ? "SystemIO" : "System Memory",
+ (unsigned long long)res->start,
+ (unsigned long long)res->end,
+ res->name);
+ if (!added)
+ kfree(res);
+ break;
+ case ACPI_ADR_SPACE_PCI_CONFIG:
+ case ACPI_ADR_SPACE_EC:
+ case ACPI_ADR_SPACE_SMBUS:
+ case ACPI_ADR_SPACE_CMOS:
+ case ACPI_ADR_SPACE_PCI_BAR_TARGET:
+ case ACPI_ADR_SPACE_DATA_TABLE:
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ break;
+ }
+ return AE_OK;
}
-
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff