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Merge branch 'acpi-debug'

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* acpi-debug:
  ACPI / debugger: Fix a redundant mutex unlock issue in acpi_aml_open()
  ACPI / debugger: copy_to_user doesn't return errors
  ACPI / debugger: remove some unneeded conditions
  ACPI / debugger: Fix an issue a flag is modified without locking
  ACPI / debugger: Add module support for ACPI debugger
  tools/power/acpi: Add userspace AML interface support
  ACPI / debugger: Add IO interface to access debugger functionalities
  ACPICA: Debugger: Fix runtime stub issues of ACPI_DEBUGGER_EXEC using different stub mechanism
  ACPICA: Debugger: Convert some mechanisms to OSPM specific
  ACPICA: Debugger: Remove unnecessary status check
This commit is contained in:
Rafael J. Wysocki 2016-01-12 01:09:06 +01:00
commit 51834d6ae9
23 changed files with 1793 additions and 211 deletions
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17
drivers/acpi/Kconfig
View File

@ -58,14 +58,25 @@ config ACPI_CCA_REQUIRED
bool
config ACPI_DEBUGGER
bool "AML debugger interface (EXPERIMENTAL)"
bool "AML debugger interface"
select ACPI_DEBUG
help
Enable in-kernel debugging of AML facilities: statistics, internal
object dump, single step control method execution.
Enable in-kernel debugging of AML facilities: statistics,
internal object dump, single step control method execution.
This is still under development, currently enabling this only
results in the compilation of the ACPICA debugger files.
if ACPI_DEBUGGER
config ACPI_DEBUGGER_USER
tristate "Userspace debugger accessiblity"
depends on DEBUG_FS
help
Export /sys/kernel/debug/acpi/acpidbg for userspace utilities
to access the debugger functionalities.
endif
config ACPI_SLEEP
bool
depends on SUSPEND || HIBERNATION

1
drivers/acpi/Makefile
View File

@ -79,6 +79,7 @@ obj-$(CONFIG_ACPI_EC_DEBUGFS) += ec_sys.o
obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o
obj-$(CONFIG_ACPI_BGRT) += bgrt.o
obj-$(CONFIG_ACPI_CPPC_LIB) += cppc_acpi.o
obj-$(CONFIG_ACPI_DEBUGGER_USER) += acpi_dbg.o
# processor has its own "processor." module_param namespace
processor-y := processor_driver.o

804
drivers/acpi/acpi_dbg.c Normal file
View File

@ -0,0 +1,804 @@
/*
* ACPI AML interfacing support
*
* Copyright (C) 2015, Intel Corporation
* Authors: Lv Zheng <lv.zheng@intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* #define DEBUG */
#define pr_fmt(fmt) "ACPI : AML: " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/proc_fs.h>
#include <linux/debugfs.h>
#include <linux/circ_buf.h>
#include <linux/acpi.h>
#include "internal.h"
#define ACPI_AML_BUF_ALIGN (sizeof (acpi_size))
#define ACPI_AML_BUF_SIZE PAGE_SIZE
#define circ_count(circ) \
(CIRC_CNT((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_count_to_end(circ) \
(CIRC_CNT_TO_END((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_space(circ) \
(CIRC_SPACE((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_space_to_end(circ) \
(CIRC_SPACE_TO_END((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define ACPI_AML_OPENED 0x0001
#define ACPI_AML_CLOSED 0x0002
#define ACPI_AML_IN_USER 0x0004 /* user space is writing cmd */
#define ACPI_AML_IN_KERN 0x0008 /* kernel space is reading cmd */
#define ACPI_AML_OUT_USER 0x0010 /* user space is reading log */
#define ACPI_AML_OUT_KERN 0x0020 /* kernel space is writing log */
#define ACPI_AML_USER (ACPI_AML_IN_USER | ACPI_AML_OUT_USER)
#define ACPI_AML_KERN (ACPI_AML_IN_KERN | ACPI_AML_OUT_KERN)
#define ACPI_AML_BUSY (ACPI_AML_USER | ACPI_AML_KERN)
#define ACPI_AML_OPEN (ACPI_AML_OPENED | ACPI_AML_CLOSED)
struct acpi_aml_io {
wait_queue_head_t wait;
unsigned long flags;
unsigned long users;
struct mutex lock;
struct task_struct *thread;
char out_buf[ACPI_AML_BUF_SIZE] __aligned(ACPI_AML_BUF_ALIGN);
struct circ_buf out_crc;
char in_buf[ACPI_AML_BUF_SIZE] __aligned(ACPI_AML_BUF_ALIGN);
struct circ_buf in_crc;
acpi_osd_exec_callback function;
void *context;
unsigned long usages;
};
static struct acpi_aml_io acpi_aml_io;
static bool acpi_aml_initialized;
static struct file *acpi_aml_active_reader;
static struct dentry *acpi_aml_dentry;
static inline bool __acpi_aml_running(void)
{
return acpi_aml_io.thread ? true : false;
}
static inline bool __acpi_aml_access_ok(unsigned long flag)
{
/*
* The debugger interface is in opened state (OPENED && !CLOSED),
* then it is allowed to access the debugger buffers from either
* user space or the kernel space.
* In addition, for the kernel space, only the debugger thread
* (thread ID matched) is allowed to access.
*/
if (!(acpi_aml_io.flags & ACPI_AML_OPENED) ||
(acpi_aml_io.flags & ACPI_AML_CLOSED) ||
!__acpi_aml_running())
return false;
if ((flag & ACPI_AML_KERN) &&
current != acpi_aml_io.thread)
return false;
return true;
}
static inline bool __acpi_aml_readable(struct circ_buf *circ, unsigned long flag)
{
/*
* Another read is not in progress and there is data in buffer
* available for read.
*/
if (!(acpi_aml_io.flags & flag) && circ_count(circ))
return true;
return false;
}
static inline bool __acpi_aml_writable(struct circ_buf *circ, unsigned long flag)
{
/*
* Another write is not in progress and there is buffer space
* available for write.
*/
if (!(acpi_aml_io.flags & flag) && circ_space(circ))
return true;
return false;
}
static inline bool __acpi_aml_busy(void)
{
if (acpi_aml_io.flags & ACPI_AML_BUSY)
return true;
return false;
}
static inline bool __acpi_aml_opened(void)
{
if (acpi_aml_io.flags & ACPI_AML_OPEN)
return true;
return false;
}
static inline bool __acpi_aml_used(void)
{
return acpi_aml_io.usages ? true : false;
}
static inline bool acpi_aml_running(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = __acpi_aml_running();
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_busy(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = __acpi_aml_busy();
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_used(void)
{
bool ret;
/*
* The usage count is prepared to avoid race conditions between the
* starts and the stops of the debugger thread.
*/
mutex_lock(&acpi_aml_io.lock);
ret = __acpi_aml_used();
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_kern_readable(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = !__acpi_aml_access_ok(ACPI_AML_IN_KERN) ||
__acpi_aml_readable(&acpi_aml_io.in_crc, ACPI_AML_IN_KERN);
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_kern_writable(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = !__acpi_aml_access_ok(ACPI_AML_OUT_KERN) ||
__acpi_aml_writable(&acpi_aml_io.out_crc, ACPI_AML_OUT_KERN);
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_user_readable(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = !__acpi_aml_access_ok(ACPI_AML_OUT_USER) ||
__acpi_aml_readable(&acpi_aml_io.out_crc, ACPI_AML_OUT_USER);
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static bool acpi_aml_user_writable(void)
{
bool ret;
mutex_lock(&acpi_aml_io.lock);
ret = !__acpi_aml_access_ok(ACPI_AML_IN_USER) ||
__acpi_aml_writable(&acpi_aml_io.in_crc, ACPI_AML_IN_USER);
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static int acpi_aml_lock_write(struct circ_buf *circ, unsigned long flag)
{
int ret = 0;
mutex_lock(&acpi_aml_io.lock);
if (!__acpi_aml_access_ok(flag)) {
ret = -EFAULT;
goto out;
}
if (!__acpi_aml_writable(circ, flag)) {
ret = -EAGAIN;
goto out;
}
acpi_aml_io.flags |= flag;
out:
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static int acpi_aml_lock_read(struct circ_buf *circ, unsigned long flag)
{
int ret = 0;
mutex_lock(&acpi_aml_io.lock);
if (!__acpi_aml_access_ok(flag)) {
ret = -EFAULT;
goto out;
}
if (!__acpi_aml_readable(circ, flag)) {
ret = -EAGAIN;
goto out;
}
acpi_aml_io.flags |= flag;
out:
mutex_unlock(&acpi_aml_io.lock);
return ret;
}
static void acpi_aml_unlock_fifo(unsigned long flag, bool wakeup)
{
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.flags &= ~flag;
if (wakeup)
wake_up_interruptible(&acpi_aml_io.wait);
mutex_unlock(&acpi_aml_io.lock);
}
static int acpi_aml_write_kern(const char *buf, int len)
{
int ret;
struct circ_buf *crc = &acpi_aml_io.out_crc;
int n;
char *p;
ret = acpi_aml_lock_write(crc, ACPI_AML_OUT_KERN);
if (IS_ERR_VALUE(ret))
return ret;
/* sync tail before inserting logs */
smp_mb();
p = &crc->buf[crc->head];
n = min(len, circ_space_to_end(crc));
memcpy(p, buf, n);
/* sync head after inserting logs */
smp_wmb();
crc->head = (crc->head + n) & (ACPI_AML_BUF_SIZE - 1);
acpi_aml_unlock_fifo(ACPI_AML_OUT_KERN, true);
return n;
}
static int acpi_aml_readb_kern(void)
{
int ret;
struct circ_buf *crc = &acpi_aml_io.in_crc;
char *p;
ret = acpi_aml_lock_read(crc, ACPI_AML_IN_KERN);
if (IS_ERR_VALUE(ret))
return ret;
/* sync head before removing cmds */
smp_rmb();
p = &crc->buf[crc->tail];
ret = (int)*p;
/* sync tail before inserting cmds */
smp_mb();
crc->tail = (crc->tail + 1) & (ACPI_AML_BUF_SIZE - 1);
acpi_aml_unlock_fifo(ACPI_AML_IN_KERN, true);
return ret;
}
/*
* acpi_aml_write_log() - Capture debugger output
* @msg: the debugger output
*
* This function should be used to implement acpi_os_printf() to filter out
* the debugger output and store the output into the debugger interface
* buffer. Return the size of stored logs or errno.
*/
static ssize_t acpi_aml_write_log(const char *msg)
{
int ret = 0;
int count = 0, size = 0;
if (!acpi_aml_initialized)
return -ENODEV;
if (msg)
count = strlen(msg);
while (count > 0) {
again:
ret = acpi_aml_write_kern(msg + size, count);
if (ret == -EAGAIN) {
ret = wait_event_interruptible(acpi_aml_io.wait,
acpi_aml_kern_writable());
/*
* We need to retry when the condition
* becomes true.
*/
if (ret == 0)
goto again;
break;
}
if (IS_ERR_VALUE(ret))
break;
size += ret;
count -= ret;
}
return size > 0 ? size : ret;
}
/*
* acpi_aml_read_cmd() - Capture debugger input
* @msg: the debugger input
* @size: the size of the debugger input
*
* This function should be used to implement acpi_os_get_line() to capture
* the debugger input commands and store the input commands into the
* debugger interface buffer. Return the size of stored commands or errno.
*/
static ssize_t acpi_aml_read_cmd(char *msg, size_t count)
{
int ret = 0;
int size = 0;
/*
* This is ensured by the running fact of the debugger thread
* unless a bug is introduced.
*/
BUG_ON(!acpi_aml_initialized);
while (count > 0) {
again:
/*
* Check each input byte to find the end of the command.
*/
ret = acpi_aml_readb_kern();
if (ret == -EAGAIN) {
ret = wait_event_interruptible(acpi_aml_io.wait,
acpi_aml_kern_readable());
/*
* We need to retry when the condition becomes
* true.
*/
if (ret == 0)
goto again;
}
if (IS_ERR_VALUE(ret))
break;
*(msg + size) = (char)ret;
size++;
count--;
if (ret == '\n') {
/*
* acpi_os_get_line() requires a zero terminated command
* string.
*/
*(msg + size - 1) = '\0';
break;
}
}
return size > 0 ? size : ret;
}
static int acpi_aml_thread(void *unsed)
{
acpi_osd_exec_callback function = NULL;
void *context;
mutex_lock(&acpi_aml_io.lock);
if (acpi_aml_io.function) {
acpi_aml_io.usages++;
function = acpi_aml_io.function;
context = acpi_aml_io.context;
}
mutex_unlock(&acpi_aml_io.lock);
if (function)
function(context);
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.usages--;
if (!__acpi_aml_used()) {
acpi_aml_io.thread = NULL;
wake_up(&acpi_aml_io.wait);
}
mutex_unlock(&acpi_aml_io.lock);
return 0;
}
/*
* acpi_aml_create_thread() - Create AML debugger thread
* @function: the debugger thread callback
* @context: the context to be passed to the debugger thread
*
* This function should be used to implement acpi_os_execute() which is
* used by the ACPICA debugger to create the debugger thread.
*/
static int acpi_aml_create_thread(acpi_osd_exec_callback function, void *context)
{
struct task_struct *t;
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.function = function;
acpi_aml_io.context = context;
mutex_unlock(&acpi_aml_io.lock);
t = kthread_create(acpi_aml_thread, NULL, "aml");
if (IS_ERR(t)) {
pr_err("Failed to create AML debugger thread.\n");
return PTR_ERR(t);
}
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.thread = t;
acpi_set_debugger_thread_id((acpi_thread_id)(unsigned long)t);
wake_up_process(t);
mutex_unlock(&acpi_aml_io.lock);
return 0;
}
static int acpi_aml_wait_command_ready(bool single_step,
char *buffer, size_t length)
{
acpi_status status;
if (single_step)
acpi_os_printf("\n%1c ", ACPI_DEBUGGER_EXECUTE_PROMPT);
else
acpi_os_printf("\n%1c ", ACPI_DEBUGGER_COMMAND_PROMPT);
status = acpi_os_get_line(buffer, length, NULL);
if (ACPI_FAILURE(status))
return -EINVAL;
return 0;
}
static int acpi_aml_notify_command_complete(void)
{
return 0;
}
static int acpi_aml_open(struct inode *inode, struct file *file)
{
int ret = 0;
acpi_status status;
mutex_lock(&acpi_aml_io.lock);
/*
* The debugger interface is being closed, no new user is allowed
* during this period.
*/
if (acpi_aml_io.flags & ACPI_AML_CLOSED) {
ret = -EBUSY;
goto err_lock;
}
if ((file->f_flags & O_ACCMODE) != O_WRONLY) {
/*
* Only one reader is allowed to initiate the debugger
* thread.
*/
if (acpi_aml_active_reader) {
ret = -EBUSY;
goto err_lock;
} else {
pr_debug("Opening debugger reader.\n");
acpi_aml_active_reader = file;
}
} else {
/*
* No writer is allowed unless the debugger thread is
* ready.
*/
if (!(acpi_aml_io.flags & ACPI_AML_OPENED)) {
ret = -ENODEV;
goto err_lock;
}
}
if (acpi_aml_active_reader == file) {
pr_debug("Opening debugger interface.\n");
mutex_unlock(&acpi_aml_io.lock);
pr_debug("Initializing debugger thread.\n");
status = acpi_initialize_debugger();
if (ACPI_FAILURE(status)) {
pr_err("Failed to initialize debugger.\n");
ret = -EINVAL;
goto err_exit;
}
pr_debug("Debugger thread initialized.\n");
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.flags |= ACPI_AML_OPENED;
acpi_aml_io.out_crc.head = acpi_aml_io.out_crc.tail = 0;
acpi_aml_io.in_crc.head = acpi_aml_io.in_crc.tail = 0;
pr_debug("Debugger interface opened.\n");
}
acpi_aml_io.users++;
err_lock:
if (IS_ERR_VALUE(ret)) {
if (acpi_aml_active_reader == file)
acpi_aml_active_reader = NULL;
}
mutex_unlock(&acpi_aml_io.lock);
err_exit:
return ret;
}
static int acpi_aml_release(struct inode *inode, struct file *file)
{
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.users--;
if (file == acpi_aml_active_reader) {
pr_debug("Closing debugger reader.\n");
acpi_aml_active_reader = NULL;
pr_debug("Closing debugger interface.\n");
acpi_aml_io.flags |= ACPI_AML_CLOSED;
/*
* Wake up all user space/kernel space blocked
* readers/writers.
*/
wake_up_interruptible(&acpi_aml_io.wait);
mutex_unlock(&acpi_aml_io.lock);
/*
* Wait all user space/kernel space readers/writers to
* stop so that ACPICA command loop of the debugger thread
* should fail all its command line reads after this point.
*/
wait_event(acpi_aml_io.wait, !acpi_aml_busy());
/*
* Then we try to terminate the debugger thread if it is
* not terminated.
*/
pr_debug("Terminating debugger thread.\n");
acpi_terminate_debugger();
wait_event(acpi_aml_io.wait, !acpi_aml_used());
pr_debug("Debugger thread terminated.\n");
mutex_lock(&acpi_aml_io.lock);
acpi_aml_io.flags &= ~ACPI_AML_OPENED;
}
if (acpi_aml_io.users == 0) {
pr_debug("Debugger interface closed.\n");
acpi_aml_io.flags &= ~ACPI_AML_CLOSED;
}
mutex_unlock(&acpi_aml_io.lock);
return 0;
}
static int acpi_aml_read_user(char __user *buf, int len)
{
int ret;
struct circ_buf *crc = &acpi_aml_io.out_crc;
int n;
char *p;
ret = acpi_aml_lock_read(crc, ACPI_AML_OUT_USER);
if (IS_ERR_VALUE(ret))
return ret;
/* sync head before removing logs */
smp_rmb();
p = &crc->buf[crc->tail];
n = min(len, circ_count_to_end(crc));
if (copy_to_user(buf, p, n)) {
ret = -EFAULT;
goto out;
}
/* sync tail after removing logs */
smp_mb();
crc->tail = (crc->tail + n) & (ACPI_AML_BUF_SIZE - 1);
ret = n;
out:
acpi_aml_unlock_fifo(ACPI_AML_OUT_USER, !IS_ERR_VALUE(ret));
return ret;
}
static ssize_t acpi_aml_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
int ret = 0;
int size = 0;
if (!count)
return 0;
if (!access_ok(VERIFY_WRITE, buf, count))
return -EFAULT;
while (count > 0) {
again:
ret = acpi_aml_read_user(buf + size, count);
if (ret == -EAGAIN) {
if (file->f_flags & O_NONBLOCK)
break;
else {
ret = wait_event_interruptible(acpi_aml_io.wait,
acpi_aml_user_readable());
/*
* We need to retry when the condition
* becomes true.
*/
if (ret == 0)
goto again;
}
}
if (IS_ERR_VALUE(ret)) {
if (!acpi_aml_running())
ret = 0;
break;
}
if (ret) {
size += ret;
count -= ret;
*ppos += ret;
break;
}
}
return size > 0 ? size : ret;
}
static int acpi_aml_write_user(const char __user *buf, int len)
{
int ret;
struct circ_buf *crc = &acpi_aml_io.in_crc;
int n;
char *p;
ret = acpi_aml_lock_write(crc, ACPI_AML_IN_USER);
if (IS_ERR_VALUE(ret))
return ret;
/* sync tail before inserting cmds */
smp_mb();
p = &crc->buf[crc->head];
n = min(len, circ_space_to_end(crc));
if (copy_from_user(p, buf, n)) {
ret = -EFAULT;
goto out;
}
/* sync head after inserting cmds */
smp_wmb();
crc->head = (crc->head + n) & (ACPI_AML_BUF_SIZE - 1);
ret = n;
out:
acpi_aml_unlock_fifo(ACPI_AML_IN_USER, !IS_ERR_VALUE(ret));
return n;
}
static ssize_t acpi_aml_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
int ret = 0;
int size = 0;
if (!count)
return 0;
if (!access_ok(VERIFY_READ, buf, count))
return -EFAULT;
while (count > 0) {
again:
ret = acpi_aml_write_user(buf + size, count);
if (ret == -EAGAIN) {
if (file->f_flags & O_NONBLOCK)
break;
else {
ret = wait_event_interruptible(acpi_aml_io.wait,
acpi_aml_user_writable());
/*
* We need to retry when the condition
* becomes true.
*/
if (ret == 0)
goto again;
}
}
if (IS_ERR_VALUE(ret)) {
if (!acpi_aml_running())
ret = 0;
break;
}
if (ret) {
size += ret;
count -= ret;
*ppos += ret;
}
}
return size > 0 ? size : ret;
}
static unsigned int acpi_aml_poll(struct file *file, poll_table *wait)
{
int masks = 0;
poll_wait(file, &acpi_aml_io.wait, wait);
if (acpi_aml_user_readable())
masks |= POLLIN | POLLRDNORM;
if (acpi_aml_user_writable())
masks |= POLLOUT | POLLWRNORM;
return masks;
}
static const struct file_operations acpi_aml_operations = {
.read = acpi_aml_read,
.write = acpi_aml_write,
.poll = acpi_aml_poll,
.open = acpi_aml_open,
.release = acpi_aml_release,
.llseek = generic_file_llseek,
};
static const struct acpi_debugger_ops acpi_aml_debugger = {
.create_thread = acpi_aml_create_thread,
.read_cmd = acpi_aml_read_cmd,
.write_log = acpi_aml_write_log,
.wait_command_ready = acpi_aml_wait_command_ready,
.notify_command_complete = acpi_aml_notify_command_complete,
};
int __init acpi_aml_init(void)
{
int ret = 0;
if (!acpi_debugfs_dir) {
ret = -ENOENT;
goto err_exit;
}
/* Initialize AML IO interface */
mutex_init(&acpi_aml_io.lock);
init_waitqueue_head(&acpi_aml_io.wait);
acpi_aml_io.out_crc.buf = acpi_aml_io.out_buf;
acpi_aml_io.in_crc.buf = acpi_aml_io.in_buf;
acpi_aml_dentry = debugfs_create_file("acpidbg",
S_IFREG | S_IRUGO | S_IWUSR,
acpi_debugfs_dir, NULL,
&acpi_aml_operations);
if (acpi_aml_dentry == NULL) {
ret = -ENODEV;
goto err_exit;
}
ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
if (ret)
goto err_fs;
acpi_aml_initialized = true;
err_fs:
if (ret) {
debugfs_remove(acpi_aml_dentry);
acpi_aml_dentry = NULL;
}
err_exit:
return ret;
}
void __exit acpi_aml_exit(void)
{
if (acpi_aml_initialized) {
acpi_unregister_debugger(&acpi_aml_debugger);
if (acpi_aml_dentry) {
debugfs_remove(acpi_aml_dentry);
acpi_aml_dentry = NULL;
}
acpi_aml_initialized = false;
}
}
module_init(acpi_aml_init);
module_exit(acpi_aml_exit);
MODULE_AUTHOR("Lv Zheng");
MODULE_DESCRIPTION("ACPI debugger userspace IO driver");
MODULE_LICENSE("GPL");

36
drivers/acpi/acpica/acdebug.h
View File

@ -80,9 +80,15 @@ struct acpi_db_execute_walk {
/*
* dbxface - external debugger interfaces
*/
acpi_status
acpi_db_single_step(struct acpi_walk_state *walk_state,
union acpi_parse_object *op, u32 op_type);
ACPI_DBR_DEPENDENT_RETURN_OK(acpi_status
acpi_db_single_step(struct acpi_walk_state
*walk_state,
union acpi_parse_object *op,
u32 op_type))
ACPI_DBR_DEPENDENT_RETURN_VOID(void
acpi_db_signal_break_point(struct
acpi_walk_state
*walk_state))
/*
* dbcmds - debug commands and output routines
@ -182,11 +188,15 @@ void acpi_db_display_method_info(union acpi_parse_object *op);
void acpi_db_decode_and_display_object(char *target, char *output_type);
void
acpi_db_display_result_object(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state);
ACPI_DBR_DEPENDENT_RETURN_VOID(void
acpi_db_display_result_object(union
acpi_operand_object
*obj_desc,
struct
acpi_walk_state
*walk_state))
acpi_status acpi_db_display_all_methods(char *display_count_arg);
acpi_status acpi_db_display_all_methods(char *display_count_arg);
void acpi_db_display_arguments(void);
@ -198,9 +208,13 @@ void acpi_db_display_calling_tree(void);
void acpi_db_display_object_type(char *object_arg);
void
acpi_db_display_argument_object(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state);
ACPI_DBR_DEPENDENT_RETURN_VOID(void
acpi_db_display_argument_object(union
acpi_operand_object
*obj_desc,
struct
acpi_walk_state
*walk_state))
/*
* dbexec - debugger control method execution
@ -257,7 +271,7 @@ acpi_db_command_dispatch(char *input_buffer,
void ACPI_SYSTEM_XFACE acpi_db_execute_thread(void *context);
acpi_status acpi_db_user_commands(char prompt, union acpi_parse_object *op);
acpi_status acpi_db_user_commands(void);
char *acpi_db_get_next_token(char *string,
char **next, acpi_object_type * return_type);

5
drivers/acpi/acpica/acglobal.h
View File

@ -326,7 +326,6 @@ ACPI_GLOBAL(struct acpi_external_file *, acpi_gbl_external_file_list);
#ifdef ACPI_DEBUGGER
ACPI_INIT_GLOBAL(u8, acpi_gbl_abort_method, FALSE);
ACPI_INIT_GLOBAL(u8, acpi_gbl_method_executing, FALSE);
ACPI_INIT_GLOBAL(acpi_thread_id, acpi_gbl_db_thread_id, ACPI_INVALID_THREAD_ID);
ACPI_GLOBAL(u8, acpi_gbl_db_opt_no_ini_methods);
@ -345,7 +344,6 @@ ACPI_GLOBAL(acpi_object_type, acpi_gbl_db_arg_types[ACPI_DEBUGGER_MAX_ARGS]);
/* These buffers should all be the same size */
ACPI_GLOBAL(char, acpi_gbl_db_line_buf[ACPI_DB_LINE_BUFFER_SIZE]);
ACPI_GLOBAL(char, acpi_gbl_db_parsed_buf[ACPI_DB_LINE_BUFFER_SIZE]);
ACPI_GLOBAL(char, acpi_gbl_db_scope_buf[ACPI_DB_LINE_BUFFER_SIZE]);
ACPI_GLOBAL(char, acpi_gbl_db_debug_filename[ACPI_DB_LINE_BUFFER_SIZE]);
@ -360,9 +358,6 @@ ACPI_GLOBAL(u16, acpi_gbl_node_type_count_misc);
ACPI_GLOBAL(u32, acpi_gbl_num_nodes);
ACPI_GLOBAL(u32, acpi_gbl_num_objects);
ACPI_GLOBAL(acpi_mutex, acpi_gbl_db_command_ready);
ACPI_GLOBAL(acpi_mutex, acpi_gbl_db_command_complete);
#endif /* ACPI_DEBUGGER */
/*****************************************************************************

11
drivers/acpi/acpica/acmacros.h
View File

@ -400,17 +400,6 @@
#define ACPI_HW_OPTIONAL_FUNCTION(addr) NULL
#endif
/*
* Some code only gets executed when the debugger is built in.
* Note that this is entirely independent of whether the
* DEBUG_PRINT stuff (set by ACPI_DEBUG_OUTPUT) is on, or not.
*/
#ifdef ACPI_DEBUGGER
#define ACPI_DEBUGGER_EXEC(a) a
#else
#define ACPI_DEBUGGER_EXEC(a)
#endif
/*
* Macros used for ACPICA utilities only
*/

12
drivers/acpi/acpica/dbdisply.c
View File

@ -679,6 +679,12 @@ acpi_db_display_result_object(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
#ifndef ACPI_APPLICATION
if (acpi_gbl_db_thread_id != acpi_os_get_thread_id()) {
return;
}
#endif
/* Only display if single stepping */
if (!acpi_gbl_cm_single_step) {
@ -708,6 +714,12 @@ acpi_db_display_argument_object(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
#ifndef ACPI_APPLICATION
if (acpi_gbl_db_thread_id != acpi_os_get_thread_id()) {
return;
}
#endif
if (!acpi_gbl_cm_single_step) {
return;
}

100
drivers/acpi/acpica/dbinput.c
View File

@ -53,8 +53,6 @@ static u32 acpi_db_get_line(char *input_buffer);
static u32 acpi_db_match_command(char *user_command);
static void acpi_db_single_thread(void);
static void acpi_db_display_command_info(char *command, u8 display_all);
static void acpi_db_display_help(char *command);
@ -1149,55 +1147,16 @@ acpi_db_command_dispatch(char *input_buffer,
void ACPI_SYSTEM_XFACE acpi_db_execute_thread(void *context)
{
acpi_status status = AE_OK;
acpi_status Mstatus;
while (status != AE_CTRL_TERMINATE && !acpi_gbl_db_terminate_loop) {
acpi_gbl_method_executing = FALSE;
acpi_gbl_step_to_next_call = FALSE;
Mstatus = acpi_os_acquire_mutex(acpi_gbl_db_command_ready,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE(Mstatus)) {
return;
}
status =
acpi_db_command_dispatch(acpi_gbl_db_line_buf, NULL, NULL);
acpi_os_release_mutex(acpi_gbl_db_command_complete);
}
(void)acpi_db_user_commands();
acpi_gbl_db_threads_terminated = TRUE;
}
/*******************************************************************************
*
* FUNCTION: acpi_db_single_thread
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Debugger execute thread. Waits for a command line, then
* simply dispatches it.
*
******************************************************************************/
static void acpi_db_single_thread(void)
{
acpi_gbl_method_executing = FALSE;
acpi_gbl_step_to_next_call = FALSE;
(void)acpi_db_command_dispatch(acpi_gbl_db_line_buf, NULL, NULL);
}
/*******************************************************************************
*
* FUNCTION: acpi_db_user_commands
*
* PARAMETERS: prompt - User prompt (depends on mode)
* op - Current executing parse op
* PARAMETERS: None
*
* RETURN: None
*
@ -1206,7 +1165,7 @@ static void acpi_db_single_thread(void)
*
******************************************************************************/
acpi_status acpi_db_user_commands(char prompt, union acpi_parse_object *op)
acpi_status acpi_db_user_commands(void)
{
acpi_status status = AE_OK;
@ -1216,52 +1175,31 @@ acpi_status acpi_db_user_commands(char prompt, union acpi_parse_object *op)
while (!acpi_gbl_db_terminate_loop) {
/* Force output to console until a command is entered */
/* Wait the readiness of the command */
acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
/* Different prompt if method is executing */
if (!acpi_gbl_method_executing) {
acpi_os_printf("%1c ", ACPI_DEBUGGER_COMMAND_PROMPT);
} else {
acpi_os_printf("%1c ", ACPI_DEBUGGER_EXECUTE_PROMPT);
}
/* Get the user input line */
status = acpi_os_get_line(acpi_gbl_db_line_buf,
ACPI_DB_LINE_BUFFER_SIZE, NULL);
status = acpi_os_wait_command_ready();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"While parsing command line"));
return (status);
break;
}
/* Check for single or multithreaded debug */
/* Just call to the command line interpreter */
if (acpi_gbl_debugger_configuration & DEBUGGER_MULTI_THREADED) {
/*
* Signal the debug thread that we have a command to execute,
* and wait for the command to complete.
*/
acpi_os_release_mutex(acpi_gbl_db_command_ready);
if (ACPI_FAILURE(status)) {
return (status);
}
acpi_gbl_method_executing = FALSE;
acpi_gbl_step_to_next_call = FALSE;
status =
acpi_os_acquire_mutex(acpi_gbl_db_command_complete,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE(status)) {
return (status);
}
} else {
/* Just call to the command line interpreter */
(void)acpi_db_command_dispatch(acpi_gbl_db_line_buf, NULL,
NULL);
acpi_db_single_thread();
/* Notify the completion of the command */
status = acpi_os_notify_command_complete();
if (ACPI_FAILURE(status)) {
break;
}
}
if (ACPI_FAILURE(status) && status != AE_CTRL_TERMINATE) {
ACPI_EXCEPTION((AE_INFO, status, "While parsing command line"));
}
return (status);
}

93
drivers/acpi/acpica/dbxface.c
View File

@ -85,46 +85,21 @@ acpi_db_start_command(struct acpi_walk_state *walk_state,
acpi_gbl_method_executing = TRUE;
status = AE_CTRL_TRUE;
while (status == AE_CTRL_TRUE) {
if (acpi_gbl_debugger_configuration == DEBUGGER_MULTI_THREADED) {
/* Handshake with the front-end that gets user command lines */
/* Notify the completion of the command */
acpi_os_release_mutex(acpi_gbl_db_command_complete);
status = acpi_os_notify_command_complete();
if (ACPI_FAILURE(status)) {
goto error_exit;
}
status =
acpi_os_acquire_mutex(acpi_gbl_db_command_ready,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE(status)) {
return (status);
}
} else {
/* Single threaded, we must get a command line ourselves */
/* Wait the readiness of the command */
/* Force output to console until a command is entered */
acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
/* Different prompt if method is executing */
if (!acpi_gbl_method_executing) {
acpi_os_printf("%1c ",
ACPI_DEBUGGER_COMMAND_PROMPT);
} else {
acpi_os_printf("%1c ",
ACPI_DEBUGGER_EXECUTE_PROMPT);
}
/* Get the user input line */
status = acpi_os_get_line(acpi_gbl_db_line_buf,
ACPI_DB_LINE_BUFFER_SIZE,
NULL);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"While parsing command line"));
return (status);
}
status = acpi_os_wait_command_ready();
if (ACPI_FAILURE(status)) {
goto error_exit;
}
status =
@ -134,9 +109,44 @@ acpi_db_start_command(struct acpi_walk_state *walk_state,
/* acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); */
error_exit:
if (ACPI_FAILURE(status) && status != AE_CTRL_TERMINATE) {
ACPI_EXCEPTION((AE_INFO, status,
"While parsing/handling command line"));
}
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_db_signal_break_point
*
* PARAMETERS: walk_state - Current walk
*
* RETURN: Status
*
* DESCRIPTION: Called for AML_BREAK_POINT_OP
*
******************************************************************************/
void acpi_db_signal_break_point(struct acpi_walk_state *walk_state)
{
#ifndef ACPI_APPLICATION
if (acpi_gbl_db_thread_id != acpi_os_get_thread_id()) {
return;
}
#endif
/*
* Set the single-step flag. This will cause the debugger (if present)
* to break to the console within the AML debugger at the start of the
* next AML instruction.
*/
acpi_gbl_cm_single_step = TRUE;
acpi_os_printf("**break** Executed AML BreakPoint opcode\n");
}
/*******************************************************************************
*
* FUNCTION: acpi_db_single_step
@ -420,15 +430,7 @@ acpi_status acpi_initialize_debugger(void)
/* These were created with one unit, grab it */
status = acpi_os_acquire_mutex(acpi_gbl_db_command_complete,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE(status)) {
acpi_os_printf("Could not get debugger mutex\n");
return_ACPI_STATUS(status);
}
status = acpi_os_acquire_mutex(acpi_gbl_db_command_ready,
ACPI_WAIT_FOREVER);
status = acpi_os_initialize_command_signals();
if (ACPI_FAILURE(status)) {
acpi_os_printf("Could not get debugger mutex\n");
return_ACPI_STATUS(status);
@ -473,13 +475,14 @@ void acpi_terminate_debugger(void)
acpi_gbl_db_terminate_loop = TRUE;
if (acpi_gbl_debugger_configuration & DEBUGGER_MULTI_THREADED) {
acpi_os_release_mutex(acpi_gbl_db_command_ready);
/* Wait the AML Debugger threads */
while (!acpi_gbl_db_threads_terminated) {
acpi_os_sleep(100);
}
acpi_os_terminate_command_signals();
}
if (acpi_gbl_db_buffer) {

10
drivers/acpi/acpica/dscontrol.c
View File

@ -47,6 +47,7 @@
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acdebug.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dscontrol")
@ -348,14 +349,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
case AML_BREAK_POINT_OP:
/*
* Set the single-step flag. This will cause the debugger (if present)
* to break to the console within the AML debugger at the start of the
* next AML instruction.
*/
ACPI_DEBUGGER_EXEC(acpi_gbl_cm_single_step = TRUE);
ACPI_DEBUGGER_EXEC(acpi_os_printf
("**break** Executed AML BreakPoint opcode\n"));
acpi_db_signal_break_point(walk_state);
/* Call to the OSL in case OS wants a piece of the action */

16
drivers/acpi/acpica/dsutils.c
View File

@ -605,8 +605,8 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state,
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
(obj_desc, walk_state));
acpi_db_display_argument_object(obj_desc, walk_state);
} else {
/* Check for null name case */
@ -638,10 +638,11 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state,
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Argument previously created, already stacked\n"));
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
(walk_state->
operands[walk_state->num_operands -
1], walk_state));
acpi_db_display_argument_object(walk_state->
operands[walk_state->
num_operands -
1],
walk_state);
/*
* Use value that was already previously returned
@ -685,8 +686,7 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state,
return_ACPI_STATUS(status);
}
ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object
(obj_desc, walk_state));
acpi_db_display_argument_object(obj_desc, walk_state);
}
return_ACPI_STATUS(AE_OK);

16
drivers/acpi/acpica/dswexec.c
View File

@ -178,8 +178,7 @@ cleanup:
/* Break to debugger to display result */
ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
(local_obj_desc, walk_state));
acpi_db_display_result_object(local_obj_desc, walk_state);
/*
* Delete the predicate result object (we know that
@ -386,11 +385,10 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
/* Call debugger for single step support (DEBUG build only) */
ACPI_DEBUGGER_EXEC(status =
acpi_db_single_step(walk_state, op, op_class));
ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);}
) ;
status = acpi_db_single_step(walk_state, op, op_class);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Decode the Opcode Class */
@ -728,8 +726,8 @@ cleanup:
/* Break to debugger to display result */
ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
(walk_state->result_obj, walk_state));
acpi_db_display_result_object(walk_state->result_obj,
walk_state);
/*
* Delete the result op if and only if:

17
drivers/acpi/acpica/utmutex.c
View File

@ -111,17 +111,6 @@ acpi_status acpi_ut_mutex_initialize(void)
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
#ifdef ACPI_DEBUGGER
/* Debugger Support */
status = acpi_os_create_mutex(&acpi_gbl_db_command_ready);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_os_create_mutex(&acpi_gbl_db_command_complete);
#endif
return_ACPI_STATUS(status);
}
@ -162,12 +151,6 @@ void acpi_ut_mutex_terminate(void)
/* Delete the reader/writer lock */
acpi_ut_delete_rw_lock(&acpi_gbl_namespace_rw_lock);
#ifdef ACPI_DEBUGGER
acpi_os_delete_mutex(acpi_gbl_db_command_ready);
acpi_os_delete_mutex(acpi_gbl_db_command_complete);
#endif
return_VOID;
}

1
drivers/acpi/bus.c
View File

@ -1094,6 +1094,7 @@ static int __init acpi_init(void)
acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();
acpi_debugger_init();
return 0;
}

250
drivers/acpi/osl.c
View File

@ -220,6 +220,7 @@ void acpi_os_printf(const char *fmt, ...)
acpi_os_vprintf(fmt, args);
va_end(args);
}
EXPORT_SYMBOL(acpi_os_printf);
void acpi_os_vprintf(const char *fmt, va_list args)
{
@ -234,7 +235,8 @@ void acpi_os_vprintf(const char *fmt, va_list args)
printk(KERN_CONT "%s", buffer);
}
#else
printk(KERN_CONT "%s", buffer);
if (acpi_debugger_write_log(buffer) < 0)
printk(KERN_CONT "%s", buffer);
#endif
}
@ -1101,6 +1103,200 @@ static void acpi_os_execute_deferred(struct work_struct *work)
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
@ -1127,6 +1323,15 @@ acpi_status acpi_os_execute(acpi_execute_type type,
"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("Call to kthread_create() 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
@ -1151,11 +1356,17 @@ acpi_status acpi_os_execute(acpi_execute_type type,
if (type == OSL_NOTIFY_HANDLER) {
queue = kacpi_notify_wq;
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
} else {
} 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
@ -1164,13 +1375,15 @@ acpi_status acpi_os_execute(acpi_execute_type type,
* queueing on CPU 0.
*/
ret = queue_work_on(0, queue, &dpc->work);
if (!ret) {
printk(KERN_ERR PREFIX
"Call to queue_work() failed.\n");
status = AE_ERROR;
kfree(dpc);
}
err_workqueue:
if (ACPI_FAILURE(status))
kfree(dpc);
out_thread:
return status;
}
EXPORT_SYMBOL(acpi_os_execute);
@ -1358,10 +1571,39 @@ acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
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)
{

18
include/acpi/acpiosxf.h
View File

@ -349,12 +349,28 @@ void acpi_os_redirect_output(void *destination);
#endif
/*
* Debug input
* Debug IO
*/
#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_get_line
acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read);
#endif
#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_initialize_command_signals
acpi_status acpi_os_initialize_command_signals(void);
#endif
#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_terminate_command_signals
void acpi_os_terminate_command_signals(void);
#endif
#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_wait_command_ready
acpi_status acpi_os_wait_command_ready(void);
#endif
#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_notify_command_complete
acpi_status acpi_os_notify_command_complete(void);
#endif
/*
* Obtain ACPI table(s)
*/

34
include/acpi/acpixf.h
View File

@ -263,6 +263,15 @@ ACPI_INIT_GLOBAL(u32, acpi_gbl_trace_dbg_layer, ACPI_TRACE_LAYER_DEFAULT);
ACPI_INIT_GLOBAL(u32, acpi_dbg_level, ACPI_DEBUG_DEFAULT);
ACPI_INIT_GLOBAL(u32, acpi_dbg_layer, 0);
/*
* Debugger command handshake globals. Host OSes need to access these
* variables to implement their own command handshake mechanism.
*/
#ifdef ACPI_DEBUGGER
ACPI_INIT_GLOBAL(u8, acpi_gbl_method_executing, FALSE);
ACPI_GLOBAL(char, acpi_gbl_db_line_buf[ACPI_DB_LINE_BUFFER_SIZE]);
#endif
/*
* Other miscellaneous globals
*/
@ -366,6 +375,29 @@ ACPI_GLOBAL(u8, acpi_gbl_system_awake_and_running);
#endif /* ACPI_APPLICATION */
/*
* Debugger prototypes
*
* All interfaces used by debugger will be configured
* out of the ACPICA build unless the ACPI_DEBUGGER
* flag is defined.
*/
#ifdef ACPI_DEBUGGER
#define ACPI_DBR_DEPENDENT_RETURN_OK(prototype) \
ACPI_EXTERNAL_RETURN_OK(prototype)
#define ACPI_DBR_DEPENDENT_RETURN_VOID(prototype) \
ACPI_EXTERNAL_RETURN_VOID(prototype)
#else
#define ACPI_DBR_DEPENDENT_RETURN_OK(prototype) \
static ACPI_INLINE prototype {return(AE_OK);}
#define ACPI_DBR_DEPENDENT_RETURN_VOID(prototype) \
static ACPI_INLINE prototype {return;}
#endif /* ACPI_DEBUGGER */
/*****************************************************************************
*
* ACPICA public interface prototypes
@ -929,6 +961,8 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status
void **data,
void (*callback)(void *)))
void acpi_run_debugger(char *batch_buffer);
void acpi_set_debugger_thread_id(acpi_thread_id thread_id);
#endif /* __ACXFACE_H__ */

2
include/acpi/platform/aclinux.h
View File

@ -150,6 +150,8 @@
*/
#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_readable
#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_writable
#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_initialize_command_signals
#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_terminate_command_signals
/*
* OSL interfaces used by utilities

9
include/acpi/platform/aclinuxex.h
View File

@ -129,6 +129,15 @@ static inline u8 acpi_os_readable(void *pointer, acpi_size length)
return TRUE;
}
static inline acpi_status acpi_os_initialize_command_signals(void)
{
return AE_OK;
}
static inline void acpi_os_terminate_command_signals(void)
{
}
/*
* OSL interfaces added by Linux
*/

71
include/linux/acpi.h
View File

@ -37,6 +37,8 @@
#include <linux/list.h>
#include <linux/mod_devicetable.h>
#include <linux/dynamic_debug.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
@ -119,6 +121,75 @@ typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);
typedef int (*acpi_tbl_entry_handler)(struct acpi_subtable_header *header,
const unsigned long end);
/* Debugger support */
struct acpi_debugger_ops {
int (*create_thread)(acpi_osd_exec_callback function, void *context);
ssize_t (*write_log)(const char *msg);
ssize_t (*read_cmd)(char *buffer, size_t length);
int (*wait_command_ready)(bool single_step, char *buffer, size_t length);
int (*notify_command_complete)(void);
};
struct acpi_debugger {
const struct acpi_debugger_ops *ops;
struct module *owner;
struct mutex lock;
};
#ifdef CONFIG_ACPI_DEBUGGER
int __init acpi_debugger_init(void);
int acpi_register_debugger(struct module *owner,
const struct acpi_debugger_ops *ops);
void acpi_unregister_debugger(const struct acpi_debugger_ops *ops);
int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context);
ssize_t acpi_debugger_write_log(const char *msg);
ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length);
int acpi_debugger_wait_command_ready(void);
int acpi_debugger_notify_command_complete(void);
#else
static inline int acpi_debugger_init(void)
{
return -ENODEV;
}
static inline int acpi_register_debugger(struct module *owner,
const struct acpi_debugger_ops *ops)
{
return -ENODEV;
}
static inline void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
{
}
static inline int acpi_debugger_create_thread(acpi_osd_exec_callback function,
void *context)
{
return -ENODEV;
}
static inline int acpi_debugger_write_log(const char *msg)
{
return -ENODEV;
}
static inline int acpi_debugger_read_cmd(char *buffer, u32 buffer_length)
{
return -ENODEV;
}
static inline int acpi_debugger_wait_command_ready(void)
{
return -ENODEV;
}
static inline int acpi_debugger_notify_command_complete(void)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
void acpi_initrd_override(void *data, size_t size);
#else

16
tools/power/acpi/Makefile
View File

@ -10,18 +10,18 @@
include ../../scripts/Makefile.include
all: acpidump ec
clean: acpidump_clean ec_clean
install: acpidump_install ec_install
uninstall: acpidump_uninstall ec_uninstall
all: acpidbg acpidump ec
clean: acpidbg_clean acpidump_clean ec_clean
install: acpidbg_install acpidump_install ec_install
uninstall: acpidbg_uninstall acpidump_uninstall ec_uninstall
acpidump ec: FORCE
acpidbg acpidump ec: FORCE
$(call descend,tools/$@,all)
acpidump_clean ec_clean:
acpidbg_clean acpidump_clean ec_clean:
$(call descend,tools/$(@:_clean=),clean)
acpidump_install ec_install:
acpidbg_install acpidump_install ec_install:
$(call descend,tools/$(@:_install=),install)
acpidump_uninstall ec_uninstall:
acpidbg_uninstall acpidump_uninstall ec_uninstall:
$(call descend,tools/$(@:_uninstall=),uninstall)
.PHONY: FORCE

27
tools/power/acpi/tools/acpidbg/Makefile Normal file
View File

@ -0,0 +1,27 @@
# tools/power/acpi/tools/acpidbg/Makefile - ACPI tool Makefile
#
# Copyright (c) 2015, Intel Corporation
# Author: Lv Zheng <lv.zheng@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; version 2
# of the License.
include ../../Makefile.config
TOOL = acpidbg
vpath %.c \
../../../../../drivers/acpi/acpica\
../../common\
../../os_specific/service_layers\
.
CFLAGS += -DACPI_APPLICATION -DACPI_SINGLE_THREAD -DACPI_DEBUGGER\
-I.\
-I../../../../../drivers/acpi/acpica\
-I../../../../../include
LDFLAGS += -lpthread
TOOL_OBJS = \
acpidbg.o
include ../../Makefile.rules

438
tools/power/acpi/tools/acpidbg/acpidbg.c Normal file
View File

@ -0,0 +1,438 @@
/*
* ACPI AML interfacing userspace utility
*
* Copyright (C) 2015, Intel Corporation
* Authors: Lv Zheng <lv.zheng@intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <acpi/acpi.h>
/* Headers not included by include/acpi/platform/aclinux.h */
#include <stdbool.h>
#include <fcntl.h>
#include <assert.h>
#include <linux/circ_buf.h>
#define ACPI_AML_FILE "/sys/kernel/debug/acpi/acpidbg"
#define ACPI_AML_SEC_TICK 1
#define ACPI_AML_USEC_PEEK 200
#define ACPI_AML_BUF_SIZE 4096
#define ACPI_AML_BATCH_WRITE_CMD 0x00 /* Write command to kernel */
#define ACPI_AML_BATCH_READ_LOG 0x01 /* Read log from kernel */
#define ACPI_AML_BATCH_WRITE_LOG 0x02 /* Write log to console */
#define ACPI_AML_LOG_START 0x00
#define ACPI_AML_PROMPT_START 0x01
#define ACPI_AML_PROMPT_STOP 0x02
#define ACPI_AML_LOG_STOP 0x03
#define ACPI_AML_PROMPT_ROLL 0x04
#define ACPI_AML_INTERACTIVE 0x00
#define ACPI_AML_BATCH 0x01
#define circ_count(circ) \
(CIRC_CNT((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_count_to_end(circ) \
(CIRC_CNT_TO_END((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_space(circ) \
(CIRC_SPACE((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define circ_space_to_end(circ) \
(CIRC_SPACE_TO_END((circ)->head, (circ)->tail, ACPI_AML_BUF_SIZE))
#define acpi_aml_cmd_count() circ_count(&acpi_aml_cmd_crc)
#define acpi_aml_log_count() circ_count(&acpi_aml_log_crc)
#define acpi_aml_cmd_space() circ_space(&acpi_aml_cmd_crc)
#define acpi_aml_log_space() circ_space(&acpi_aml_log_crc)
#define ACPI_AML_DO(_fd, _op, _buf, _ret) \
do { \
_ret = acpi_aml_##_op(_fd, &acpi_aml_##_buf##_crc); \
if (_ret == 0) { \
fprintf(stderr, \
"%s %s pipe closed.\n", #_buf, #_op); \
return; \
} \
} while (0)
#define ACPI_AML_BATCH_DO(_fd, _op, _buf, _ret) \
do { \
_ret = acpi_aml_##_op##_batch_##_buf(_fd, \
&acpi_aml_##_buf##_crc); \
if (_ret == 0) \
return; \
} while (0)
static char acpi_aml_cmd_buf[ACPI_AML_BUF_SIZE];
static char acpi_aml_log_buf[ACPI_AML_BUF_SIZE];
static struct circ_buf acpi_aml_cmd_crc = {
.buf = acpi_aml_cmd_buf,
.head = 0,
.tail = 0,
};
static struct circ_buf acpi_aml_log_crc = {
.buf = acpi_aml_log_buf,
.head = 0,
.tail = 0,
};
static const char *acpi_aml_file_path = ACPI_AML_FILE;
static unsigned long acpi_aml_mode = ACPI_AML_INTERACTIVE;
static bool acpi_aml_exit;
static bool acpi_aml_batch_drain;
static unsigned long acpi_aml_batch_state;
static char acpi_aml_batch_prompt;
static char acpi_aml_batch_roll;
static unsigned long acpi_aml_log_state;
static char *acpi_aml_batch_cmd = NULL;
static char *acpi_aml_batch_pos = NULL;
static int acpi_aml_set_fl(int fd, int flags)
{
int ret;
ret = fcntl(fd, F_GETFL, 0);
if (ret < 0) {
perror("fcntl(F_GETFL)");
return ret;
}
flags |= ret;
ret = fcntl(fd, F_SETFL, flags);
if (ret < 0) {
perror("fcntl(F_SETFL)");
return ret;
}
return ret;
}
static int acpi_aml_set_fd(int fd, int maxfd, fd_set *set)
{
if (fd > maxfd)
maxfd = fd;
FD_SET(fd, set);
return maxfd;
}
static int acpi_aml_read(int fd, struct circ_buf *crc)
{
char *p;
int len;
p = &crc->buf[crc->head];
len = circ_space_to_end(crc);
len = read(fd, p, len);
if (len < 0)
perror("read");
else if (len > 0)
crc->head = (crc->head + len) & (ACPI_AML_BUF_SIZE - 1);
return len;
}
static int acpi_aml_read_batch_cmd(int unused, struct circ_buf *crc)
{
char *p;
int len;
int remained = strlen(acpi_aml_batch_pos);
p = &crc->buf[crc->head];
len = circ_space_to_end(crc);
if (len > remained) {
memcpy(p, acpi_aml_batch_pos, remained);
acpi_aml_batch_pos += remained;
len = remained;
} else {
memcpy(p, acpi_aml_batch_pos, len);
acpi_aml_batch_pos += len;
}
if (len > 0)
crc->head = (crc->head + len) & (ACPI_AML_BUF_SIZE - 1);
return len;
}
static int acpi_aml_read_batch_log(int fd, struct circ_buf *crc)
{
char *p;
int len;
int ret = 0;
p = &crc->buf[crc->head];
len = circ_space_to_end(crc);
while (ret < len && acpi_aml_log_state != ACPI_AML_LOG_STOP) {
if (acpi_aml_log_state == ACPI_AML_PROMPT_ROLL) {
*p = acpi_aml_batch_roll;
len = 1;
crc->head = (crc->head + 1) & (ACPI_AML_BUF_SIZE - 1);
ret += 1;
acpi_aml_log_state = ACPI_AML_LOG_START;
} else {
len = read(fd, p, 1);
if (len <= 0) {
if (len < 0)
perror("read");
ret = len;
break;
}
}
switch (acpi_aml_log_state) {
case ACPI_AML_LOG_START:
if (*p == '\n')
acpi_aml_log_state = ACPI_AML_PROMPT_START;
crc->head = (crc->head + 1) & (ACPI_AML_BUF_SIZE - 1);
ret += 1;
break;
case ACPI_AML_PROMPT_START:
if (*p == ACPI_DEBUGGER_COMMAND_PROMPT ||
*p == ACPI_DEBUGGER_EXECUTE_PROMPT) {
acpi_aml_batch_prompt = *p;
acpi_aml_log_state = ACPI_AML_PROMPT_STOP;
} else {
if (*p != '\n')
acpi_aml_log_state = ACPI_AML_LOG_START;
crc->head = (crc->head + 1) & (ACPI_AML_BUF_SIZE - 1);
ret += 1;
}
break;
case ACPI_AML_PROMPT_STOP:
if (*p == ' ') {
acpi_aml_log_state = ACPI_AML_LOG_STOP;
acpi_aml_exit = true;
} else {
/* Roll back */
acpi_aml_log_state = ACPI_AML_PROMPT_ROLL;
acpi_aml_batch_roll = *p;
*p = acpi_aml_batch_prompt;
crc->head = (crc->head + 1) & (ACPI_AML_BUF_SIZE - 1);
ret += 1;
}
break;
default:
assert(0);
break;
}
}
return ret;
}
static int acpi_aml_write(int fd, struct circ_buf *crc)
{
char *p;
int len;
p = &crc->buf[crc->tail];
len = circ_count_to_end(crc);
len = write(fd, p, len);
if (len < 0)
perror("write");
else if (len > 0)
crc->tail = (crc->tail + len) & (ACPI_AML_BUF_SIZE - 1);
return len;
}
static int acpi_aml_write_batch_log(int fd, struct circ_buf *crc)
{
char *p;
int len;
p = &crc->buf[crc->tail];
len = circ_count_to_end(crc);
if (!acpi_aml_batch_drain) {
len = write(fd, p, len);
if (len < 0)
perror("write");
}
if (len > 0)
crc->tail = (crc->tail + len) & (ACPI_AML_BUF_SIZE - 1);
return len;
}
static int acpi_aml_write_batch_cmd(int fd, struct circ_buf *crc)
{
int len;
len = acpi_aml_write(fd, crc);
if (circ_count_to_end(crc) == 0)
acpi_aml_batch_state = ACPI_AML_BATCH_READ_LOG;
return len;
}
static void acpi_aml_loop(int fd)
{
fd_set rfds;
fd_set wfds;
struct timeval tv;
int ret;
int maxfd = 0;
if (acpi_aml_mode == ACPI_AML_BATCH) {
acpi_aml_log_state = ACPI_AML_LOG_START;
acpi_aml_batch_pos = acpi_aml_batch_cmd;
if (acpi_aml_batch_drain)
acpi_aml_batch_state = ACPI_AML_BATCH_READ_LOG;
else
acpi_aml_batch_state = ACPI_AML_BATCH_WRITE_CMD;
}
acpi_aml_exit = false;
while (!acpi_aml_exit) {
tv.tv_sec = ACPI_AML_SEC_TICK;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
if (acpi_aml_cmd_space()) {
if (acpi_aml_mode == ACPI_AML_INTERACTIVE)
maxfd = acpi_aml_set_fd(STDIN_FILENO, maxfd, &rfds);
else if (strlen(acpi_aml_batch_pos) &&
acpi_aml_batch_state == ACPI_AML_BATCH_WRITE_CMD)
ACPI_AML_BATCH_DO(STDIN_FILENO, read, cmd, ret);
}
if (acpi_aml_cmd_count() &&
(acpi_aml_mode == ACPI_AML_INTERACTIVE ||
acpi_aml_batch_state == ACPI_AML_BATCH_WRITE_CMD))
maxfd = acpi_aml_set_fd(fd, maxfd, &wfds);
if (acpi_aml_log_space() &&
(acpi_aml_mode == ACPI_AML_INTERACTIVE ||
acpi_aml_batch_state == ACPI_AML_BATCH_READ_LOG))
maxfd = acpi_aml_set_fd(fd, maxfd, &rfds);
if (acpi_aml_log_count())
maxfd = acpi_aml_set_fd(STDOUT_FILENO, maxfd, &wfds);
ret = select(maxfd+1, &rfds, &wfds, NULL, &tv);
if (ret < 0) {
perror("select");
break;
}
if (ret > 0) {
if (FD_ISSET(STDIN_FILENO, &rfds))
ACPI_AML_DO(STDIN_FILENO, read, cmd, ret);
if (FD_ISSET(fd, &wfds)) {
if (acpi_aml_mode == ACPI_AML_BATCH)
ACPI_AML_BATCH_DO(fd, write, cmd, ret);
else
ACPI_AML_DO(fd, write, cmd, ret);
}
if (FD_ISSET(fd, &rfds)) {
if (acpi_aml_mode == ACPI_AML_BATCH)
ACPI_AML_BATCH_DO(fd, read, log, ret);
else
ACPI_AML_DO(fd, read, log, ret);
}
if (FD_ISSET(STDOUT_FILENO, &wfds)) {
if (acpi_aml_mode == ACPI_AML_BATCH)
ACPI_AML_BATCH_DO(STDOUT_FILENO, write, log, ret);
else
ACPI_AML_DO(STDOUT_FILENO, write, log, ret);
}
}
}
}
static bool acpi_aml_readable(int fd)
{
fd_set rfds;
struct timeval tv;
int ret;
int maxfd = 0;
tv.tv_sec = 0;
tv.tv_usec = ACPI_AML_USEC_PEEK;
FD_ZERO(&rfds);
maxfd = acpi_aml_set_fd(fd, maxfd, &rfds);
ret = select(maxfd+1, &rfds, NULL, NULL, &tv);
if (ret < 0)
perror("select");
if (ret > 0 && FD_ISSET(fd, &rfds))
return true;
return false;
}
/*
* This is a userspace IO flush implementation, replying on the prompt
* characters and can be turned into a flush() call after kernel implements
* .flush() filesystem operation.
*/
static void acpi_aml_flush(int fd)
{
while (acpi_aml_readable(fd)) {
acpi_aml_batch_drain = true;
acpi_aml_loop(fd);
acpi_aml_batch_drain = false;
}
}
void usage(FILE *file, char *progname)
{
fprintf(file, "usage: %s [-b cmd] [-f file] [-h]\n", progname);
fprintf(file, "\nOptions:\n");
fprintf(file, " -b Specify command to be executed in batch mode\n");
fprintf(file, " -f Specify interface file other than");
fprintf(file, " /sys/kernel/debug/acpi/acpidbg\n");
fprintf(file, " -h Print this help message\n");
}
int main(int argc, char **argv)
{
int fd = 0;
int ch;
int len;
int ret = EXIT_SUCCESS;
while ((ch = getopt(argc, argv, "b:f:h")) != -1) {
switch (ch) {
case 'b':
if (acpi_aml_batch_cmd) {
fprintf(stderr, "Already specify %s\n",
acpi_aml_batch_cmd);
ret = EXIT_FAILURE;
goto exit;
}
len = strlen(optarg);
acpi_aml_batch_cmd = calloc(len + 2, 1);
if (!acpi_aml_batch_cmd) {
perror("calloc");
ret = EXIT_FAILURE;
goto exit;
}
memcpy(acpi_aml_batch_cmd, optarg, len);
acpi_aml_batch_cmd[len] = '\n';
acpi_aml_mode = ACPI_AML_BATCH;
break;
case 'f':
acpi_aml_file_path = optarg;
break;
case 'h':
usage(stdout, argv[0]);
goto exit;
break;
case '?':
default:
usage(stderr, argv[0]);
ret = EXIT_FAILURE;
goto exit;
break;
}
}
fd = open(acpi_aml_file_path, O_RDWR | O_NONBLOCK);
if (fd < 0) {
perror("open");
ret = EXIT_FAILURE;
goto exit;
}
acpi_aml_set_fl(STDIN_FILENO, O_NONBLOCK);
acpi_aml_set_fl(STDOUT_FILENO, O_NONBLOCK);
if (acpi_aml_mode == ACPI_AML_BATCH)
acpi_aml_flush(fd);
acpi_aml_loop(fd);
exit:
if (fd < 0)
close(fd);
if (acpi_aml_batch_cmd)
free(acpi_aml_batch_cmd);
return ret;
}