static void
salinfo_timeout (unsigned long arg)
{
ia64_mlogbuf_dump();
salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_MCA);
salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_INIT);
salinfo_timer.expires = jiffies + SALINFO_TIMER_DELAY;
add_timer(&salinfo_timer);
}
static void
salinfo_timeout(struct timer_list *unused)
{
ia64_mlogbuf_dump();
salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_MCA);
salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_INIT);
salinfo_timer.expires = jiffies + SALINFO_TIMER_DELAY;
add_timer(&salinfo_timer);
}
static ssize_t
salinfo_event_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
{
struct inode *inode = file->f_path.dentry->d_inode;
struct proc_dir_entry *entry = PDE(inode);
struct salinfo_data *data = entry->data;
char cmd[32];
size_t size;
int i, n, cpu = -1;
retry:
if (cpus_empty(data->cpu_event) && down_trylock(&data->mutex)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
if (down_interruptible(&data->mutex))
return -EINTR;
}
n = data->cpu_check;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_isset(n, data->cpu_event)) {
if (!cpu_online(n)) {
cpu_clear(n, data->cpu_event);
continue;
}
cpu = n;
break;
}
if (++n == NR_CPUS)
n = 0;
}
if (cpu == -1)
goto retry;
ia64_mlogbuf_dump();
/* for next read, start checking at next CPU */
data->cpu_check = cpu;
if (++data->cpu_check == NR_CPUS)
data->cpu_check = 0;
snprintf(cmd, sizeof(cmd), "read %d\n", cpu);
size = strlen(cmd);
if (size > count)
size = count;
if (copy_to_user(buffer, cmd, size))
return -EFAULT;
return size;
}
static ssize_t
salinfo_event_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
{
struct salinfo_data *data = PDE_DATA(file_inode(file));
char cmd[32];
size_t size;
int i, n, cpu = -1;
retry:
if (cpumask_empty(&data->cpu_event)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
if (wait_event_interruptible(data->read_wait,
!cpumask_empty(&data->cpu_event)))
return -EINTR;
}
n = data->cpu_check;
for (i = 0; i < nr_cpu_ids; i++) {
if (cpumask_test_cpu(n, &data->cpu_event)) {
if (!cpu_online(n)) {
cpumask_clear_cpu(n, &data->cpu_event);
continue;
}
cpu = n;
break;
}
if (++n == nr_cpu_ids)
n = 0;
}
if (cpu == -1)
goto retry;
ia64_mlogbuf_dump();
/* for next read, start checking at next CPU */
data->cpu_check = cpu;
if (++data->cpu_check == nr_cpu_ids)
data->cpu_check = 0;
snprintf(cmd, sizeof(cmd), "read %d\n", cpu);
size = strlen(cmd);
if (size > count)
size = count;
if (copy_to_user(buffer, cmd, size))
return -EFAULT;
return size;
}
