diff options
Diffstat (limited to 'drivers/misc/ibmasm/ibmasmfs.c')
| -rw-r--r-- | drivers/misc/ibmasm/ibmasmfs.c | 125 |
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); } } |