* Currently does not provide timestamps. As the hardware doesn't add them they
* can only be inferred approximately from ring buffer events such as 50% full
* and knowledge of when buffer was last emptied. This is left to userspace.
+ *
+ * Temporarily deliberately broken.
**/
static int sca3000_read_first_n_hw_rb(struct iio_ring_buffer *r,
- size_t count, u8 **data, int *dead_offset)
+ size_t count, char __user *buf,
+ int *dead_offset)
{
struct iio_hw_ring_buffer *hw_ring = iio_to_hw_ring_buf(r);
struct iio_dev *indio_dev = hw_ring->private;
s16 *samples;
int ret, i, num_available, num_read = 0;
int bytes_per_sample = 1;
+ u8 *datas;
+ u8 **data = &datas;
if (st->bpse == 11)
bytes_per_sample = 2;
void sca3000_ring_int_process(u8 val, struct iio_ring_buffer *ring)
{
if (val & SCA3000_INT_STATUS_THREE_QUARTERS)
- iio_push_or_escallate_ring_event(ring,
- IIO_EVENT_CODE_RING_75_FULL,
- 0);
+ iio_push_ring_event(ring,
+ IIO_EVENT_CODE_RING_75_FULL,
+ 0);
else if (val & SCA3000_INT_STATUS_HALF)
iio_push_ring_event(ring,
IIO_EVENT_CODE_RING_50_FULL, 0);
* struct iio_detected_event_list - list element for events that have occurred
* @list: linked list header
* @ev: the event itself
- * @shared_pointer: used when the event is shared - i.e. can be escallated
- * on demand (eg ring buffer 50%->100% full)
*/
struct iio_detected_event_list {
struct list_head list;
struct iio_event_data ev;
- struct iio_shared_ev_pointer *shared_pointer;
-};
-/**
- * struct iio_shared_ev_pointer - allows shared events to identify if currently
- * in the detected event list
- * @ev_p: pointer to detected event list element (null if not in list)
- * @lock: protect this element to prevent simultaneous edit and remove
- */
-struct iio_shared_ev_pointer {
- struct iio_detected_event_list *ev_p;
- spinlock_t lock;
};
/**
* @ev_int: the event interface to which we are pushing the event
* @ev_code: the outgoing event code
* @timestamp: timestamp of the event
- * @shared_pointer_p: the shared event pointer
**/
int __iio_push_event(struct iio_event_interface *ev_int,
- int ev_code,
- s64 timestamp,
- struct iio_shared_ev_pointer*
- shared_pointer_p);
-/**
- * __iio_change_event() - change an event code in case of event escalation
- * @ev: the event to be changed
- * @ev_code: new event code
- * @timestamp: new timestamp
- **/
-void __iio_change_event(struct iio_detected_event_list *ev,
- int ev_code,
- s64 timestamp);
+ int ev_code,
+ s64 timestamp);
/**
* iio_setup_ev_int() - configure an event interface (chrdev)
[IIO_CHAN_INFO_CALIBBIAS_SHARED/2] = "calibbias",
};
-void __iio_change_event(struct iio_detected_event_list *ev,
- int ev_code,
- s64 timestamp)
-{
- ev->ev.id = ev_code;
- ev->ev.timestamp = timestamp;
-}
-EXPORT_SYMBOL(__iio_change_event);
-
/* Used both in the interrupt line put events and the ring buffer ones */
/* Note that in it's current form someone has to be listening before events
*/
int __iio_push_event(struct iio_event_interface *ev_int,
int ev_code,
- s64 timestamp,
- struct iio_shared_ev_pointer *
- shared_pointer_p)
+ s64 timestamp)
{
struct iio_detected_event_list *ev;
int ret = 0;
}
ev->ev.id = ev_code;
ev->ev.timestamp = timestamp;
- ev->shared_pointer = shared_pointer_p;
- if (ev->shared_pointer)
- shared_pointer_p->ev_p = ev;
list_add_tail(&ev->list, &ev_int->det_events.list);
ev_int->current_events++;
s64 timestamp)
{
return __iio_push_event(&dev_info->event_interfaces[ev_line],
- ev_code, timestamp, NULL);
+ ev_code, timestamp);
}
EXPORT_SYMBOL(iio_push_event);
list_del(&el->list);
ev_int->current_events--;
mutex_unlock(&ev_int->event_list_lock);
- /*
- * Possible concurency issue if an update of this event is on its way
- * through. May lead to new event being removed whilst the reported
- * event was the unescalated event. In typical use case this is not a
- * problem as userspace will say read half the buffer due to a 50%
- * full event which would make the correct 100% full incorrect anyway.
- */
- if (el->shared_pointer) {
- spin_lock(&el->shared_pointer->lock);
- (el->shared_pointer->ev_p) = NULL;
- spin_unlock(&el->shared_pointer->lock);
- }
kfree(el);
return len;
s64 timestamp)
{
return __iio_push_event(&ring_buf->ev_int,
- event_code,
- timestamp,
- &ring_buf->shared_ev_pointer);
+ event_code,
+ timestamp);
}
EXPORT_SYMBOL(iio_push_ring_event);
-int iio_push_or_escallate_ring_event(struct iio_ring_buffer *ring_buf,
- int event_code,
- s64 timestamp)
-{
- if (ring_buf->shared_ev_pointer.ev_p)
- __iio_change_event(ring_buf->shared_ev_pointer.ev_p,
- event_code,
- timestamp);
- else
- return iio_push_ring_event(ring_buf,
- event_code,
- timestamp);
- return 0;
-}
-EXPORT_SYMBOL(iio_push_or_escallate_ring_event);
-
/**
* iio_ring_open() - chrdev file open for ring buffer access
*
ring->indio_dev = dev_info;
ring->ev_int.private = ring;
ring->access_handler.private = ring;
- ring->shared_ev_pointer.ev_p = NULL;
- spin_lock_init(&ring->shared_ev_pointer.lock);
}
EXPORT_SYMBOL(iio_ring_buffer_init);
* @scan_timestamp: [INTERN] does the scan mode include a timestamp
* @access_handler: [INTERN] chrdev access handling
* @ev_int: [INTERN] chrdev interface for the event chrdev
- * @shared_ev_pointer: [INTERN] the shared event pointer to allow escalation of
- * events
* @access: [DRIVER] ring access functions associated with the
* implementation.
* @preenable: [DRIVER] function to run prior to marking ring enabled
bool scan_timestamp;
struct iio_handler access_handler;
struct iio_event_interface ev_int;
- struct iio_shared_ev_pointer shared_ev_pointer;
struct iio_ring_access_funcs access;
int (*preenable)(struct iio_dev *);
int (*postenable)(struct iio_dev *);
*/
if (change_test_ptr == ring->read_p)
ring->read_p = temp_ptr;
-
- spin_lock(&ring->buf.shared_ev_pointer.lock);
-
- ret = iio_push_or_escallate_ring_event(&ring->buf,
- IIO_EVENT_CODE_RING_100_FULL, timestamp);
- spin_unlock(&ring->buf.shared_ev_pointer.lock);
- if (ret)
- goto error_ret;
}
/* investigate if our event barrier has been passed */
/* There are definite 'issues' with this and chances of
if (ring->half_p == ring->data + ring->buf.length*ring->buf.bytes_per_datum)
ring->half_p = ring->data;
if (ring->half_p == ring->read_p) {
- spin_lock(&ring->buf.shared_ev_pointer.lock);
code = IIO_EVENT_CODE_RING_50_FULL;
ret = __iio_push_event(&ring->buf.ev_int,
code,
- timestamp,
- &ring->buf.shared_ev_pointer);
- spin_unlock(&ring->buf.shared_ev_pointer.lock);
+ timestamp);
}
-error_ret:
return ret;
}
projects / linux-block.git / commitdiff