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path: root/drivers/misc/ibmasm/ibmasmfs.c
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Diffstat (limited to 'drivers/misc/ibmasm/ibmasmfs.c')
-rw-r--r--drivers/misc/ibmasm/ibmasmfs.c125
1 files changed, 27 insertions, 98 deletions
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index 866e867e68f2..5c550fcac2c4 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -37,9 +37,7 @@
* | |-- event
* | |-- reverse_heartbeat
* | `-- remote_video
- * | |-- connected
* | |-- depth
- * | |-- events
* | |-- height
* | `-- width
* .
@@ -50,9 +48,7 @@
* |-- event
* |-- reverse_heartbeat
* `-- remote_video
- * |-- connected
* |-- depth
- * |-- events
* |-- height
* `-- width
*
@@ -75,14 +71,6 @@
* remote_video/width: control remote display settings
* write: set value
* read: read value
- *
- * remote_video/connected
- * read: return "1" if web browser VNC java applet is connected,
- * "0" otherwise
- *
- * remote_video/events
- * read: sleep until a remote mouse or keyboard event occurs, then return
- * then event.
*/
#include <linux/fs.h>
@@ -333,7 +321,7 @@ static ssize_t command_file_write(struct file *file, const char __user *ubuff, s
if (command_data->command)
return -EAGAIN;
- cmd = ibmasm_new_command(count);
+ cmd = ibmasm_new_command(command_data->sp, count);
if (!cmd)
return -ENOMEM;
@@ -374,6 +362,7 @@ static int event_file_open(struct inode *inode, struct file *file)
ibmasm_event_reader_register(sp, &event_data->reader);
event_data->sp = sp;
+ event_data->active = 0;
file->private_data = event_data;
return 0;
}
@@ -391,7 +380,9 @@ static ssize_t event_file_read(struct file *file, char __user *buf, size_t count
{
struct ibmasmfs_event_data *event_data = file->private_data;
struct event_reader *reader = &event_data->reader;
+ struct service_processor *sp = event_data->sp;
int ret;
+ unsigned long flags;
if (*offset < 0)
return -EINVAL;
@@ -400,17 +391,32 @@ static ssize_t event_file_read(struct file *file, char __user *buf, size_t count
if (*offset != 0)
return 0;
- ret = ibmasm_get_next_event(event_data->sp, reader);
+ spin_lock_irqsave(&sp->lock, flags);
+ if (event_data->active) {
+ spin_unlock_irqrestore(&sp->lock, flags);
+ return -EBUSY;
+ }
+ event_data->active = 1;
+ spin_unlock_irqrestore(&sp->lock, flags);
+
+ ret = ibmasm_get_next_event(sp, reader);
if (ret <= 0)
- return ret;
+ goto out;
- if (count < reader->data_size)
- return -EINVAL;
+ if (count < reader->data_size) {
+ ret = -EINVAL;
+ goto out;
+ }
- if (copy_to_user(buf, reader->data, reader->data_size))
- return -EFAULT;
+ if (copy_to_user(buf, reader->data, reader->data_size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ ret = reader->data_size;
- return reader->data_size;
+out:
+ event_data->active = 0;
+ return ret;
}
static ssize_t event_file_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
@@ -424,7 +430,7 @@ static ssize_t event_file_write(struct file *file, const char __user *buf, size_
if (*offset != 0)
return 0;
- wake_up_interruptible(&event_data->reader.wait);
+ ibmasm_cancel_next_event(&event_data->reader);
return 0;
}
@@ -575,75 +581,6 @@ static ssize_t remote_settings_file_write(struct file *file, const char __user *
return count;
}
-static int remote_event_file_open(struct inode *inode, struct file *file)
-{
- struct service_processor *sp;
- unsigned long flags;
- struct remote_queue *q;
-
- file->private_data = inode->u.generic_ip;
- sp = file->private_data;
- q = &sp->remote_queue;
-
- /* allow only one event reader */
- spin_lock_irqsave(&sp->lock, flags);
- if (q->open) {
- spin_unlock_irqrestore(&sp->lock, flags);
- return -EBUSY;
- }
- q->open = 1;
- spin_unlock_irqrestore(&sp->lock, flags);
-
- enable_mouse_interrupts(sp);
-
- return 0;
-}
-
-static int remote_event_file_close(struct inode *inode, struct file *file)
-{
- struct service_processor *sp = file->private_data;
-
- disable_mouse_interrupts(sp);
- wake_up_interruptible(&sp->remote_queue.wait);
- sp->remote_queue.open = 0;
-
- return 0;
-}
-
-static ssize_t remote_event_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- struct service_processor *sp = file->private_data;
- struct remote_queue *q = &sp->remote_queue;
- size_t data_size;
- struct remote_event *reader = q->reader;
- size_t num_events;
-
- if (*offset < 0)
- return -EINVAL;
- if (count == 0 || count > 1024)
- return 0;
- if (*offset != 0)
- return 0;
-
- if (wait_event_interruptible(q->wait, q->reader != q->writer))
- return -ERESTARTSYS;
-
- /* only get multiples of struct remote_event */
- num_events = min((count/sizeof(struct remote_event)), ibmasm_events_available(q));
- if (!num_events)
- return 0;
-
- data_size = num_events * sizeof(struct remote_event);
-
- if (copy_to_user(buf, reader, data_size))
- return -EFAULT;
-
- ibmasm_advance_reader(q, num_events);
-
- return data_size;
-}
-
-
static struct file_operations command_fops = {
.open = command_file_open,
.release = command_file_close,
@@ -672,12 +609,6 @@ static struct file_operations remote_settings_fops = {
.write = remote_settings_file_write,
};
-static struct file_operations remote_event_fops = {
- .open = remote_event_file_open,
- .release = remote_event_file_close,
- .read = remote_event_file_read,
-};
-
static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root)
{
@@ -703,7 +634,5 @@ static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root)
ibmasmfs_create_file(sb, remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
ibmasmfs_create_file(sb, remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
ibmasmfs_create_file(sb, remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, remote_dir, "connected", &remote_settings_fops, (void *)vnc_status(sp), S_IRUSR);
- ibmasmfs_create_file(sb, remote_dir, "events", &remote_event_fops, (void *)sp, S_IRUSR);
}
}