*
* Copyright (C) IBM Corporation, 2004
*
- * Author: Max Asböck <amax@us.ibm.com>
+ * Author: Max Asböck <amax@us.ibm.com>
*
*/
#include "ibmasm.h"
+#include "lowlevel.h"
/*
* ASM service processor event handling routines.
* circular buffer.
*/
-
static void wake_up_event_readers(struct service_processor *sp)
{
struct event_reader *reader;
* event readers.
* There is no reader marker in the buffer, therefore readers are
* responsible for keeping up with the writer, or they will loose events.
- */
+ */
void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size)
{
struct event_buffer *buffer = sp->event_buffer;
spin_lock_irqsave(&sp->lock, flags);
/* copy the event into the next slot in the circular buffer */
event = &buffer->events[buffer->next_index];
- memcpy(event->data, data, data_size);
+ memcpy_fromio(event->data, data, data_size);
event->data_size = data_size;
event->serial_number = buffer->next_serial_number;
static inline int event_available(struct event_buffer *b, struct event_reader *r)
{
- return (r->next_serial_number < b->next_serial_number);
+ return (r->next_serial_number < b->next_serial_number);
}
/**
* get_next_event
* Called by event readers (initiated from user space through the file
- * system).
+ * system).
* Sleeps until a new event is available.
*/
int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader)
unsigned int index;
unsigned long flags;
- if (wait_event_interruptible(reader->wait, event_available(buffer, reader)))
+ reader->cancelled = 0;
+
+ if (wait_event_interruptible(reader->wait,
+ event_available(buffer, reader) || reader->cancelled))
return -ERESTARTSYS;
if (!event_available(buffer, reader))
return event->data_size;
}
+void ibmasm_cancel_next_event(struct event_reader *reader)
+{
+ reader->cancelled = 1;
+ wake_up_interruptible(&reader->wait);
+}
+
void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader)
{
unsigned long flags;
{
unsigned long flags;
- wake_up_interruptible(&reader->wait);
-
spin_lock_irqsave(&sp->lock, flags);
list_del(&reader->node);
spin_unlock_irqrestore(&sp->lock, flags);
void ibmasm_event_buffer_exit(struct service_processor *sp)
{
- wake_up_event_readers(sp);
kfree(sp->event_buffer);
}